367939
According to Huygens’ principle, during refraction of light from air to a denser medium
1 Wavelength and speed increase
2 Wavelength decreases but speed increases
3 Wavelength and speed decrease
4 Wavelength increases but speed decreases
Explanation:
According to Huygen’s principle, during the refraction of light from air to a denser medium both wavelength and speed decrease.
KCET - 2017
PHXII10:WAVE OPTICS
367940
Light wave travel in vacuum along the \(x\)-axis, which of the following may present the wavefront
1 \(y = a\)
2 \(x = a\)
3 \(x + y + z = a\)
4 \(z = a\)
Explanation:
As the light rays travel along \(x\)-direction the wavefront should be perpendicular to \(x\)-axis and parallel to \(yz\)-plane. The wavefronts should be \(x = a\).
PHXII10:WAVE OPTICS
367941
When the same monochromatic ray of light travels through glass slab and through water, the number of waves in glass slab of thickness \(6cm\) is same as in water column of height \(7cm\). If refractive index of glass is 1.5, then refractive index of water is
1 1.258
2 1.269
3 1.286
4 \(1.310\)
Explanation:
As, we know number of waves in glass slab = number of waves in water column \(\therefore {\mu _g}.{h_g} = {\mu _w}.{h_w}\) where \({\mu _g} = \) refractive index of glass \({\mu _w} = \) refractive index of water column \({h_g} = \) thickness of slab and \({h_w} = \) height of water column Given, \({\mu _g} = 1.5,{h_g} = 6cm,{h_w} = 7cm\) \( \Rightarrow {\mu _w} = \frac{{{\mu _g}.{h_g}}}{{{h_w}}} = \frac{{1.5 \times 6}}{7}\) \(\therefore {\mu _w} = \frac{9}{7} = 1.286\)
PHXII10:WAVE OPTICS
367942
A glass slab of thickness 8 \(cm\) contains the same number of waves as 10 \(cm\) of water when both are traversed by the same monochromatic light. If the refractive index of water is 4/3, the refractive index of glass is
1 \(16{\rm{/}}15\)
2 \(5{\rm{/}}3\)
3 \(5{\rm{/}}4\)
4 \(3{\rm{/}}2\)
Explanation:
Number of waves in a medium of thickness \(t\) is \(N = \frac{t}{{{\lambda _m}}} = \frac{{t\mu }}{\lambda }\) Where \(\lambda \) is the wavelength in vacuum Given that \({N_1} = {N_2} \Rightarrow {t_1}{\mu _1} = {t_2}{\mu _2}\) \(8{\mu _1} = 10\frac{4}{3} \Rightarrow {\mu _1} = \frac{5}{3}\)
PHXII10:WAVE OPTICS
367943
A ray of light travelling through rarer medium is incident at very small angle \(i\) on a glass slab and after refraction its velocity is reduced by \(20\% \). The angle of deviation is
1 \(\frac{i}{8}\)
2 \(\frac{i}{5}\)
3 \(\frac{i}{2}\)
4 \(\frac{{4i}}{5}\)
Explanation:
According to question, at glass - air interface velocity is reduced by \(20\% \) of the velocity of light So, deviation \(\delta = 20\% \,\,{\text{of}}\,\,i\) \( = \frac{{20 \times i}}{{100}} = \frac{i}{5}\)
367939
According to Huygens’ principle, during refraction of light from air to a denser medium
1 Wavelength and speed increase
2 Wavelength decreases but speed increases
3 Wavelength and speed decrease
4 Wavelength increases but speed decreases
Explanation:
According to Huygen’s principle, during the refraction of light from air to a denser medium both wavelength and speed decrease.
KCET - 2017
PHXII10:WAVE OPTICS
367940
Light wave travel in vacuum along the \(x\)-axis, which of the following may present the wavefront
1 \(y = a\)
2 \(x = a\)
3 \(x + y + z = a\)
4 \(z = a\)
Explanation:
As the light rays travel along \(x\)-direction the wavefront should be perpendicular to \(x\)-axis and parallel to \(yz\)-plane. The wavefronts should be \(x = a\).
PHXII10:WAVE OPTICS
367941
When the same monochromatic ray of light travels through glass slab and through water, the number of waves in glass slab of thickness \(6cm\) is same as in water column of height \(7cm\). If refractive index of glass is 1.5, then refractive index of water is
1 1.258
2 1.269
3 1.286
4 \(1.310\)
Explanation:
As, we know number of waves in glass slab = number of waves in water column \(\therefore {\mu _g}.{h_g} = {\mu _w}.{h_w}\) where \({\mu _g} = \) refractive index of glass \({\mu _w} = \) refractive index of water column \({h_g} = \) thickness of slab and \({h_w} = \) height of water column Given, \({\mu _g} = 1.5,{h_g} = 6cm,{h_w} = 7cm\) \( \Rightarrow {\mu _w} = \frac{{{\mu _g}.{h_g}}}{{{h_w}}} = \frac{{1.5 \times 6}}{7}\) \(\therefore {\mu _w} = \frac{9}{7} = 1.286\)
PHXII10:WAVE OPTICS
367942
A glass slab of thickness 8 \(cm\) contains the same number of waves as 10 \(cm\) of water when both are traversed by the same monochromatic light. If the refractive index of water is 4/3, the refractive index of glass is
1 \(16{\rm{/}}15\)
2 \(5{\rm{/}}3\)
3 \(5{\rm{/}}4\)
4 \(3{\rm{/}}2\)
Explanation:
Number of waves in a medium of thickness \(t\) is \(N = \frac{t}{{{\lambda _m}}} = \frac{{t\mu }}{\lambda }\) Where \(\lambda \) is the wavelength in vacuum Given that \({N_1} = {N_2} \Rightarrow {t_1}{\mu _1} = {t_2}{\mu _2}\) \(8{\mu _1} = 10\frac{4}{3} \Rightarrow {\mu _1} = \frac{5}{3}\)
PHXII10:WAVE OPTICS
367943
A ray of light travelling through rarer medium is incident at very small angle \(i\) on a glass slab and after refraction its velocity is reduced by \(20\% \). The angle of deviation is
1 \(\frac{i}{8}\)
2 \(\frac{i}{5}\)
3 \(\frac{i}{2}\)
4 \(\frac{{4i}}{5}\)
Explanation:
According to question, at glass - air interface velocity is reduced by \(20\% \) of the velocity of light So, deviation \(\delta = 20\% \,\,{\text{of}}\,\,i\) \( = \frac{{20 \times i}}{{100}} = \frac{i}{5}\)
367939
According to Huygens’ principle, during refraction of light from air to a denser medium
1 Wavelength and speed increase
2 Wavelength decreases but speed increases
3 Wavelength and speed decrease
4 Wavelength increases but speed decreases
Explanation:
According to Huygen’s principle, during the refraction of light from air to a denser medium both wavelength and speed decrease.
KCET - 2017
PHXII10:WAVE OPTICS
367940
Light wave travel in vacuum along the \(x\)-axis, which of the following may present the wavefront
1 \(y = a\)
2 \(x = a\)
3 \(x + y + z = a\)
4 \(z = a\)
Explanation:
As the light rays travel along \(x\)-direction the wavefront should be perpendicular to \(x\)-axis and parallel to \(yz\)-plane. The wavefronts should be \(x = a\).
PHXII10:WAVE OPTICS
367941
When the same monochromatic ray of light travels through glass slab and through water, the number of waves in glass slab of thickness \(6cm\) is same as in water column of height \(7cm\). If refractive index of glass is 1.5, then refractive index of water is
1 1.258
2 1.269
3 1.286
4 \(1.310\)
Explanation:
As, we know number of waves in glass slab = number of waves in water column \(\therefore {\mu _g}.{h_g} = {\mu _w}.{h_w}\) where \({\mu _g} = \) refractive index of glass \({\mu _w} = \) refractive index of water column \({h_g} = \) thickness of slab and \({h_w} = \) height of water column Given, \({\mu _g} = 1.5,{h_g} = 6cm,{h_w} = 7cm\) \( \Rightarrow {\mu _w} = \frac{{{\mu _g}.{h_g}}}{{{h_w}}} = \frac{{1.5 \times 6}}{7}\) \(\therefore {\mu _w} = \frac{9}{7} = 1.286\)
PHXII10:WAVE OPTICS
367942
A glass slab of thickness 8 \(cm\) contains the same number of waves as 10 \(cm\) of water when both are traversed by the same monochromatic light. If the refractive index of water is 4/3, the refractive index of glass is
1 \(16{\rm{/}}15\)
2 \(5{\rm{/}}3\)
3 \(5{\rm{/}}4\)
4 \(3{\rm{/}}2\)
Explanation:
Number of waves in a medium of thickness \(t\) is \(N = \frac{t}{{{\lambda _m}}} = \frac{{t\mu }}{\lambda }\) Where \(\lambda \) is the wavelength in vacuum Given that \({N_1} = {N_2} \Rightarrow {t_1}{\mu _1} = {t_2}{\mu _2}\) \(8{\mu _1} = 10\frac{4}{3} \Rightarrow {\mu _1} = \frac{5}{3}\)
PHXII10:WAVE OPTICS
367943
A ray of light travelling through rarer medium is incident at very small angle \(i\) on a glass slab and after refraction its velocity is reduced by \(20\% \). The angle of deviation is
1 \(\frac{i}{8}\)
2 \(\frac{i}{5}\)
3 \(\frac{i}{2}\)
4 \(\frac{{4i}}{5}\)
Explanation:
According to question, at glass - air interface velocity is reduced by \(20\% \) of the velocity of light So, deviation \(\delta = 20\% \,\,{\text{of}}\,\,i\) \( = \frac{{20 \times i}}{{100}} = \frac{i}{5}\)
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PHXII10:WAVE OPTICS
367939
According to Huygens’ principle, during refraction of light from air to a denser medium
1 Wavelength and speed increase
2 Wavelength decreases but speed increases
3 Wavelength and speed decrease
4 Wavelength increases but speed decreases
Explanation:
According to Huygen’s principle, during the refraction of light from air to a denser medium both wavelength and speed decrease.
KCET - 2017
PHXII10:WAVE OPTICS
367940
Light wave travel in vacuum along the \(x\)-axis, which of the following may present the wavefront
1 \(y = a\)
2 \(x = a\)
3 \(x + y + z = a\)
4 \(z = a\)
Explanation:
As the light rays travel along \(x\)-direction the wavefront should be perpendicular to \(x\)-axis and parallel to \(yz\)-plane. The wavefronts should be \(x = a\).
PHXII10:WAVE OPTICS
367941
When the same monochromatic ray of light travels through glass slab and through water, the number of waves in glass slab of thickness \(6cm\) is same as in water column of height \(7cm\). If refractive index of glass is 1.5, then refractive index of water is
1 1.258
2 1.269
3 1.286
4 \(1.310\)
Explanation:
As, we know number of waves in glass slab = number of waves in water column \(\therefore {\mu _g}.{h_g} = {\mu _w}.{h_w}\) where \({\mu _g} = \) refractive index of glass \({\mu _w} = \) refractive index of water column \({h_g} = \) thickness of slab and \({h_w} = \) height of water column Given, \({\mu _g} = 1.5,{h_g} = 6cm,{h_w} = 7cm\) \( \Rightarrow {\mu _w} = \frac{{{\mu _g}.{h_g}}}{{{h_w}}} = \frac{{1.5 \times 6}}{7}\) \(\therefore {\mu _w} = \frac{9}{7} = 1.286\)
PHXII10:WAVE OPTICS
367942
A glass slab of thickness 8 \(cm\) contains the same number of waves as 10 \(cm\) of water when both are traversed by the same monochromatic light. If the refractive index of water is 4/3, the refractive index of glass is
1 \(16{\rm{/}}15\)
2 \(5{\rm{/}}3\)
3 \(5{\rm{/}}4\)
4 \(3{\rm{/}}2\)
Explanation:
Number of waves in a medium of thickness \(t\) is \(N = \frac{t}{{{\lambda _m}}} = \frac{{t\mu }}{\lambda }\) Where \(\lambda \) is the wavelength in vacuum Given that \({N_1} = {N_2} \Rightarrow {t_1}{\mu _1} = {t_2}{\mu _2}\) \(8{\mu _1} = 10\frac{4}{3} \Rightarrow {\mu _1} = \frac{5}{3}\)
PHXII10:WAVE OPTICS
367943
A ray of light travelling through rarer medium is incident at very small angle \(i\) on a glass slab and after refraction its velocity is reduced by \(20\% \). The angle of deviation is
1 \(\frac{i}{8}\)
2 \(\frac{i}{5}\)
3 \(\frac{i}{2}\)
4 \(\frac{{4i}}{5}\)
Explanation:
According to question, at glass - air interface velocity is reduced by \(20\% \) of the velocity of light So, deviation \(\delta = 20\% \,\,{\text{of}}\,\,i\) \( = \frac{{20 \times i}}{{100}} = \frac{i}{5}\)
367939
According to Huygens’ principle, during refraction of light from air to a denser medium
1 Wavelength and speed increase
2 Wavelength decreases but speed increases
3 Wavelength and speed decrease
4 Wavelength increases but speed decreases
Explanation:
According to Huygen’s principle, during the refraction of light from air to a denser medium both wavelength and speed decrease.
KCET - 2017
PHXII10:WAVE OPTICS
367940
Light wave travel in vacuum along the \(x\)-axis, which of the following may present the wavefront
1 \(y = a\)
2 \(x = a\)
3 \(x + y + z = a\)
4 \(z = a\)
Explanation:
As the light rays travel along \(x\)-direction the wavefront should be perpendicular to \(x\)-axis and parallel to \(yz\)-plane. The wavefronts should be \(x = a\).
PHXII10:WAVE OPTICS
367941
When the same monochromatic ray of light travels through glass slab and through water, the number of waves in glass slab of thickness \(6cm\) is same as in water column of height \(7cm\). If refractive index of glass is 1.5, then refractive index of water is
1 1.258
2 1.269
3 1.286
4 \(1.310\)
Explanation:
As, we know number of waves in glass slab = number of waves in water column \(\therefore {\mu _g}.{h_g} = {\mu _w}.{h_w}\) where \({\mu _g} = \) refractive index of glass \({\mu _w} = \) refractive index of water column \({h_g} = \) thickness of slab and \({h_w} = \) height of water column Given, \({\mu _g} = 1.5,{h_g} = 6cm,{h_w} = 7cm\) \( \Rightarrow {\mu _w} = \frac{{{\mu _g}.{h_g}}}{{{h_w}}} = \frac{{1.5 \times 6}}{7}\) \(\therefore {\mu _w} = \frac{9}{7} = 1.286\)
PHXII10:WAVE OPTICS
367942
A glass slab of thickness 8 \(cm\) contains the same number of waves as 10 \(cm\) of water when both are traversed by the same monochromatic light. If the refractive index of water is 4/3, the refractive index of glass is
1 \(16{\rm{/}}15\)
2 \(5{\rm{/}}3\)
3 \(5{\rm{/}}4\)
4 \(3{\rm{/}}2\)
Explanation:
Number of waves in a medium of thickness \(t\) is \(N = \frac{t}{{{\lambda _m}}} = \frac{{t\mu }}{\lambda }\) Where \(\lambda \) is the wavelength in vacuum Given that \({N_1} = {N_2} \Rightarrow {t_1}{\mu _1} = {t_2}{\mu _2}\) \(8{\mu _1} = 10\frac{4}{3} \Rightarrow {\mu _1} = \frac{5}{3}\)
PHXII10:WAVE OPTICS
367943
A ray of light travelling through rarer medium is incident at very small angle \(i\) on a glass slab and after refraction its velocity is reduced by \(20\% \). The angle of deviation is
1 \(\frac{i}{8}\)
2 \(\frac{i}{5}\)
3 \(\frac{i}{2}\)
4 \(\frac{{4i}}{5}\)
Explanation:
According to question, at glass - air interface velocity is reduced by \(20\% \) of the velocity of light So, deviation \(\delta = 20\% \,\,{\text{of}}\,\,i\) \( = \frac{{20 \times i}}{{100}} = \frac{i}{5}\)