NEET Test Series from KOTA - 10 Papers In MS WORD
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283592
Polarising angle for water is \(53^{\circ} 4\) '. If light is incident at this angle on the surface of water and reflected the angle of refraction is
1 \(53^{\circ} 4^{\prime}\)
2 \(126^{\circ} 56^{\prime}\)
3 \(36^{\circ} 56^{\prime}\)
4 \(30^{\circ} 4^{\prime}\)
Explanation:
: Given, polarising angle for water \(\left(\mathrm{i}_{\mathrm{p}}\right)=53^{\circ} 4^{\prime}\) We know, angle of refraction - \(r=90^{\circ}-i_p\) \(r=90^{\circ}-53^{\circ} 4^{\prime}\) \(r=89^{\circ} 60^{\prime}-53^{\circ} 4^{\prime}\) \(r=36^{\circ} 56^{\prime}\)
VITEEE-2011
WAVE OPTICS
283593
The polarising angle of glass is \(57^{\circ}\). A ray of light which is incident at this angle will have an angle of refraction as :
1 \(43^{\circ}\)
2 \(25^{\circ}\)
3 \(38^{\circ}\)
4 \(33^{\circ}\)
Explanation:
: Given, polarising angle of glass \(\left(\theta_p\right)=57^{\circ}\) According to the Brewster's law We have, \(\theta_{\mathrm{p}}+\mathrm{r} =90^{\circ}\) \(\mathrm{r} =90^{\circ}-\theta_{\mathrm{p}}\) \(\mathrm{r} =90^{\circ}-57^{\circ}\)Angle of refraction \((\mathrm{r})=33^{\circ}\)
Karnataka CET-2015
WAVE OPTICS
283605
Values for Brewster's angle can be
1 only less than \(45^{\circ}\)
2 only greater than \(45^{\circ}\)
3 Any value in the range \(0^{\circ}\) to \(90^{\circ}\) except \(45^{\circ}\)
4 Any value in the range \(0^{\circ}\) to \(90^{\circ}\) including \(45^{\circ}\)
Explanation:
: According to the Brewster's law - \(\mu=\tan \theta_p\) \(\theta_p=\tan ^{-1} \mu\)Hence, the values for Brewster's angle can be only greater than \(45^{\circ}\). i.e. \(45^{\circ}<\theta_{\mathrm{p}}<90\)
J and K-CET-2015
WAVE OPTICS
283606
Polarised glass is used in sun glasses because
1 It is fashionable
2 It has good colour
3 It reduces the light intensity to half and account of polarisation
4 It is cheaper
Explanation:
: The electric field component of impolarized light is confined to one direction on one plane when it travels through a polarizer. The light intensity is cut half as a result of this polarization. Thus, the eyes feel more comfortable and the spectator can see better due to the polaroid glass used in sunglasses. The main cause of using the these glasses is safeguard your eye.
283592
Polarising angle for water is \(53^{\circ} 4\) '. If light is incident at this angle on the surface of water and reflected the angle of refraction is
1 \(53^{\circ} 4^{\prime}\)
2 \(126^{\circ} 56^{\prime}\)
3 \(36^{\circ} 56^{\prime}\)
4 \(30^{\circ} 4^{\prime}\)
Explanation:
: Given, polarising angle for water \(\left(\mathrm{i}_{\mathrm{p}}\right)=53^{\circ} 4^{\prime}\) We know, angle of refraction - \(r=90^{\circ}-i_p\) \(r=90^{\circ}-53^{\circ} 4^{\prime}\) \(r=89^{\circ} 60^{\prime}-53^{\circ} 4^{\prime}\) \(r=36^{\circ} 56^{\prime}\)
VITEEE-2011
WAVE OPTICS
283593
The polarising angle of glass is \(57^{\circ}\). A ray of light which is incident at this angle will have an angle of refraction as :
1 \(43^{\circ}\)
2 \(25^{\circ}\)
3 \(38^{\circ}\)
4 \(33^{\circ}\)
Explanation:
: Given, polarising angle of glass \(\left(\theta_p\right)=57^{\circ}\) According to the Brewster's law We have, \(\theta_{\mathrm{p}}+\mathrm{r} =90^{\circ}\) \(\mathrm{r} =90^{\circ}-\theta_{\mathrm{p}}\) \(\mathrm{r} =90^{\circ}-57^{\circ}\)Angle of refraction \((\mathrm{r})=33^{\circ}\)
Karnataka CET-2015
WAVE OPTICS
283605
Values for Brewster's angle can be
1 only less than \(45^{\circ}\)
2 only greater than \(45^{\circ}\)
3 Any value in the range \(0^{\circ}\) to \(90^{\circ}\) except \(45^{\circ}\)
4 Any value in the range \(0^{\circ}\) to \(90^{\circ}\) including \(45^{\circ}\)
Explanation:
: According to the Brewster's law - \(\mu=\tan \theta_p\) \(\theta_p=\tan ^{-1} \mu\)Hence, the values for Brewster's angle can be only greater than \(45^{\circ}\). i.e. \(45^{\circ}<\theta_{\mathrm{p}}<90\)
J and K-CET-2015
WAVE OPTICS
283606
Polarised glass is used in sun glasses because
1 It is fashionable
2 It has good colour
3 It reduces the light intensity to half and account of polarisation
4 It is cheaper
Explanation:
: The electric field component of impolarized light is confined to one direction on one plane when it travels through a polarizer. The light intensity is cut half as a result of this polarization. Thus, the eyes feel more comfortable and the spectator can see better due to the polaroid glass used in sunglasses. The main cause of using the these glasses is safeguard your eye.
283592
Polarising angle for water is \(53^{\circ} 4\) '. If light is incident at this angle on the surface of water and reflected the angle of refraction is
1 \(53^{\circ} 4^{\prime}\)
2 \(126^{\circ} 56^{\prime}\)
3 \(36^{\circ} 56^{\prime}\)
4 \(30^{\circ} 4^{\prime}\)
Explanation:
: Given, polarising angle for water \(\left(\mathrm{i}_{\mathrm{p}}\right)=53^{\circ} 4^{\prime}\) We know, angle of refraction - \(r=90^{\circ}-i_p\) \(r=90^{\circ}-53^{\circ} 4^{\prime}\) \(r=89^{\circ} 60^{\prime}-53^{\circ} 4^{\prime}\) \(r=36^{\circ} 56^{\prime}\)
VITEEE-2011
WAVE OPTICS
283593
The polarising angle of glass is \(57^{\circ}\). A ray of light which is incident at this angle will have an angle of refraction as :
1 \(43^{\circ}\)
2 \(25^{\circ}\)
3 \(38^{\circ}\)
4 \(33^{\circ}\)
Explanation:
: Given, polarising angle of glass \(\left(\theta_p\right)=57^{\circ}\) According to the Brewster's law We have, \(\theta_{\mathrm{p}}+\mathrm{r} =90^{\circ}\) \(\mathrm{r} =90^{\circ}-\theta_{\mathrm{p}}\) \(\mathrm{r} =90^{\circ}-57^{\circ}\)Angle of refraction \((\mathrm{r})=33^{\circ}\)
Karnataka CET-2015
WAVE OPTICS
283605
Values for Brewster's angle can be
1 only less than \(45^{\circ}\)
2 only greater than \(45^{\circ}\)
3 Any value in the range \(0^{\circ}\) to \(90^{\circ}\) except \(45^{\circ}\)
4 Any value in the range \(0^{\circ}\) to \(90^{\circ}\) including \(45^{\circ}\)
Explanation:
: According to the Brewster's law - \(\mu=\tan \theta_p\) \(\theta_p=\tan ^{-1} \mu\)Hence, the values for Brewster's angle can be only greater than \(45^{\circ}\). i.e. \(45^{\circ}<\theta_{\mathrm{p}}<90\)
J and K-CET-2015
WAVE OPTICS
283606
Polarised glass is used in sun glasses because
1 It is fashionable
2 It has good colour
3 It reduces the light intensity to half and account of polarisation
4 It is cheaper
Explanation:
: The electric field component of impolarized light is confined to one direction on one plane when it travels through a polarizer. The light intensity is cut half as a result of this polarization. Thus, the eyes feel more comfortable and the spectator can see better due to the polaroid glass used in sunglasses. The main cause of using the these glasses is safeguard your eye.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
WAVE OPTICS
283592
Polarising angle for water is \(53^{\circ} 4\) '. If light is incident at this angle on the surface of water and reflected the angle of refraction is
1 \(53^{\circ} 4^{\prime}\)
2 \(126^{\circ} 56^{\prime}\)
3 \(36^{\circ} 56^{\prime}\)
4 \(30^{\circ} 4^{\prime}\)
Explanation:
: Given, polarising angle for water \(\left(\mathrm{i}_{\mathrm{p}}\right)=53^{\circ} 4^{\prime}\) We know, angle of refraction - \(r=90^{\circ}-i_p\) \(r=90^{\circ}-53^{\circ} 4^{\prime}\) \(r=89^{\circ} 60^{\prime}-53^{\circ} 4^{\prime}\) \(r=36^{\circ} 56^{\prime}\)
VITEEE-2011
WAVE OPTICS
283593
The polarising angle of glass is \(57^{\circ}\). A ray of light which is incident at this angle will have an angle of refraction as :
1 \(43^{\circ}\)
2 \(25^{\circ}\)
3 \(38^{\circ}\)
4 \(33^{\circ}\)
Explanation:
: Given, polarising angle of glass \(\left(\theta_p\right)=57^{\circ}\) According to the Brewster's law We have, \(\theta_{\mathrm{p}}+\mathrm{r} =90^{\circ}\) \(\mathrm{r} =90^{\circ}-\theta_{\mathrm{p}}\) \(\mathrm{r} =90^{\circ}-57^{\circ}\)Angle of refraction \((\mathrm{r})=33^{\circ}\)
Karnataka CET-2015
WAVE OPTICS
283605
Values for Brewster's angle can be
1 only less than \(45^{\circ}\)
2 only greater than \(45^{\circ}\)
3 Any value in the range \(0^{\circ}\) to \(90^{\circ}\) except \(45^{\circ}\)
4 Any value in the range \(0^{\circ}\) to \(90^{\circ}\) including \(45^{\circ}\)
Explanation:
: According to the Brewster's law - \(\mu=\tan \theta_p\) \(\theta_p=\tan ^{-1} \mu\)Hence, the values for Brewster's angle can be only greater than \(45^{\circ}\). i.e. \(45^{\circ}<\theta_{\mathrm{p}}<90\)
J and K-CET-2015
WAVE OPTICS
283606
Polarised glass is used in sun glasses because
1 It is fashionable
2 It has good colour
3 It reduces the light intensity to half and account of polarisation
4 It is cheaper
Explanation:
: The electric field component of impolarized light is confined to one direction on one plane when it travels through a polarizer. The light intensity is cut half as a result of this polarization. Thus, the eyes feel more comfortable and the spectator can see better due to the polaroid glass used in sunglasses. The main cause of using the these glasses is safeguard your eye.