368944
Which colour of the light has the longest wavelength?
1 Red
2 Blue
3 Green
4 Violet
Explanation:
Conceptual Question
NEET - 2019
PHXII08:ELECTROMAGNETIC WAVES
368945
Which of the following rays is emmitted by a human body?
1 Visible light
2 \(UV\) rays
3 \(X\)-rays
4 \(IR\) rays
Explanation:
Temperature of the body is \(37^\circ C\) and it emits heat radiation which falls in \(IR\) and microwave region.
PHXII08:ELECTROMAGNETIC WAVES
368946
Which of the following statement does not hold good for thermal radiation?
1 The wavelength changes when it travels from one medium to another.
2 The frequency changes when it travels from one medium to another.
3 The speed changes when it travels from one medium to antother.
4 They travel in straight line in a given medium
Explanation:
When radiation travels from one medium to another, its wavelength and speed changes whereas frequency remains unchanged.
KCET - 2009
PHXII08:ELECTROMAGNETIC WAVES
368947
One requires \(11eV\) of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in
1 Infrared region
2 Visible region
3 Microwave region
4 Ultraviolet region
Explanation:
Given, energy required to dissociate a carbon monoxide molecule into carbon and oxygen atoms. \(E = 11e\,V\) We know that, \(E = h\upsilon \), where \(h = 6.62 \times {10^{ - 34}}J - s;\upsilon = {\rm{ frequency }}\) \( \Rightarrow 11e\upsilon = h\upsilon \) \( \Rightarrow \quad \upsilon = \frac{{11 \times 1 \cdot 6 \times {{10}^{ - 19}}}}{h}\;J\) \(E = h\upsilon \) \( = \frac{{11 \times 1 \cdot 6 \times {{10}^{ - 19}}}}{{6 \cdot 62 \times {{10}^{ - 34}}}}\;J = 2.65 \times {10^{15}}\;Hz\) This frequency belongs to ultraviolet region.
368944
Which colour of the light has the longest wavelength?
1 Red
2 Blue
3 Green
4 Violet
Explanation:
Conceptual Question
NEET - 2019
PHXII08:ELECTROMAGNETIC WAVES
368945
Which of the following rays is emmitted by a human body?
1 Visible light
2 \(UV\) rays
3 \(X\)-rays
4 \(IR\) rays
Explanation:
Temperature of the body is \(37^\circ C\) and it emits heat radiation which falls in \(IR\) and microwave region.
PHXII08:ELECTROMAGNETIC WAVES
368946
Which of the following statement does not hold good for thermal radiation?
1 The wavelength changes when it travels from one medium to another.
2 The frequency changes when it travels from one medium to another.
3 The speed changes when it travels from one medium to antother.
4 They travel in straight line in a given medium
Explanation:
When radiation travels from one medium to another, its wavelength and speed changes whereas frequency remains unchanged.
KCET - 2009
PHXII08:ELECTROMAGNETIC WAVES
368947
One requires \(11eV\) of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in
1 Infrared region
2 Visible region
3 Microwave region
4 Ultraviolet region
Explanation:
Given, energy required to dissociate a carbon monoxide molecule into carbon and oxygen atoms. \(E = 11e\,V\) We know that, \(E = h\upsilon \), where \(h = 6.62 \times {10^{ - 34}}J - s;\upsilon = {\rm{ frequency }}\) \( \Rightarrow 11e\upsilon = h\upsilon \) \( \Rightarrow \quad \upsilon = \frac{{11 \times 1 \cdot 6 \times {{10}^{ - 19}}}}{h}\;J\) \(E = h\upsilon \) \( = \frac{{11 \times 1 \cdot 6 \times {{10}^{ - 19}}}}{{6 \cdot 62 \times {{10}^{ - 34}}}}\;J = 2.65 \times {10^{15}}\;Hz\) This frequency belongs to ultraviolet region.
368944
Which colour of the light has the longest wavelength?
1 Red
2 Blue
3 Green
4 Violet
Explanation:
Conceptual Question
NEET - 2019
PHXII08:ELECTROMAGNETIC WAVES
368945
Which of the following rays is emmitted by a human body?
1 Visible light
2 \(UV\) rays
3 \(X\)-rays
4 \(IR\) rays
Explanation:
Temperature of the body is \(37^\circ C\) and it emits heat radiation which falls in \(IR\) and microwave region.
PHXII08:ELECTROMAGNETIC WAVES
368946
Which of the following statement does not hold good for thermal radiation?
1 The wavelength changes when it travels from one medium to another.
2 The frequency changes when it travels from one medium to another.
3 The speed changes when it travels from one medium to antother.
4 They travel in straight line in a given medium
Explanation:
When radiation travels from one medium to another, its wavelength and speed changes whereas frequency remains unchanged.
KCET - 2009
PHXII08:ELECTROMAGNETIC WAVES
368947
One requires \(11eV\) of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in
1 Infrared region
2 Visible region
3 Microwave region
4 Ultraviolet region
Explanation:
Given, energy required to dissociate a carbon monoxide molecule into carbon and oxygen atoms. \(E = 11e\,V\) We know that, \(E = h\upsilon \), where \(h = 6.62 \times {10^{ - 34}}J - s;\upsilon = {\rm{ frequency }}\) \( \Rightarrow 11e\upsilon = h\upsilon \) \( \Rightarrow \quad \upsilon = \frac{{11 \times 1 \cdot 6 \times {{10}^{ - 19}}}}{h}\;J\) \(E = h\upsilon \) \( = \frac{{11 \times 1 \cdot 6 \times {{10}^{ - 19}}}}{{6 \cdot 62 \times {{10}^{ - 34}}}}\;J = 2.65 \times {10^{15}}\;Hz\) This frequency belongs to ultraviolet region.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
PHXII08:ELECTROMAGNETIC WAVES
368944
Which colour of the light has the longest wavelength?
1 Red
2 Blue
3 Green
4 Violet
Explanation:
Conceptual Question
NEET - 2019
PHXII08:ELECTROMAGNETIC WAVES
368945
Which of the following rays is emmitted by a human body?
1 Visible light
2 \(UV\) rays
3 \(X\)-rays
4 \(IR\) rays
Explanation:
Temperature of the body is \(37^\circ C\) and it emits heat radiation which falls in \(IR\) and microwave region.
PHXII08:ELECTROMAGNETIC WAVES
368946
Which of the following statement does not hold good for thermal radiation?
1 The wavelength changes when it travels from one medium to another.
2 The frequency changes when it travels from one medium to another.
3 The speed changes when it travels from one medium to antother.
4 They travel in straight line in a given medium
Explanation:
When radiation travels from one medium to another, its wavelength and speed changes whereas frequency remains unchanged.
KCET - 2009
PHXII08:ELECTROMAGNETIC WAVES
368947
One requires \(11eV\) of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in
1 Infrared region
2 Visible region
3 Microwave region
4 Ultraviolet region
Explanation:
Given, energy required to dissociate a carbon monoxide molecule into carbon and oxygen atoms. \(E = 11e\,V\) We know that, \(E = h\upsilon \), where \(h = 6.62 \times {10^{ - 34}}J - s;\upsilon = {\rm{ frequency }}\) \( \Rightarrow 11e\upsilon = h\upsilon \) \( \Rightarrow \quad \upsilon = \frac{{11 \times 1 \cdot 6 \times {{10}^{ - 19}}}}{h}\;J\) \(E = h\upsilon \) \( = \frac{{11 \times 1 \cdot 6 \times {{10}^{ - 19}}}}{{6 \cdot 62 \times {{10}^{ - 34}}}}\;J = 2.65 \times {10^{15}}\;Hz\) This frequency belongs to ultraviolet region.
