If $$c$$ is the velocity of light in free space, the correct statements about photon among the following are:
 A. The energy of a photon is $$E=h\nu.$$ B. The velocity of a photon is $$c.$$ C. The momentum of a photon, $$p={\dfrac{h\nu}{c}}.$$ D. In a photon-electron collision, both total energy and total momentum are conserved. E. Photon possesses positive charge.
Choose the correct answer from the options given below:
1. $$\text {A, B, C}$$ and $$\text {D}$$ only
2. $$\text {A, C}$$ and $$\text {D}$$ only
3. $$\text {A, B, D}$$ and $$\text {E}$$ only
4. $$\text {A}$$ and $$\text {B}$$ only
Subtopic: Â Particle Nature of Light |
Â 58%
From NCERT
NEET - 2024
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The number of photons per second on an average emitted by a source of monochromatic light of wavelength $$600~\text{nm}$$, when it delivers the power of $$3.3\times 10^{-3}$$ watt will be:
$$(h = 6.6\times10^{-34}~\text{J-s})$$

 1 $$10^{16}$$ 2 $$10^{15}$$ 3 $$10^{18}$$ 4 $$10^{17}$$
Subtopic: Â Particle Nature of Light |
Â 64%
From NCERT
NEET - 2021
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Radiation of energy $$E$$ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is:
($$c$$ = velocity of light)
1. $$E \over c$$
2. $$2E \over c$$
3. $$2E \over c^2$$
4. $$E \over c^2$$

Subtopic: Â Particle Nature of Light |
Â 72%
From NCERT
NEET - 2015
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A $$200~\text{W}$$ sodium street lamp emits yellow light of wavelength $$0.6~\mu\text{m}$$. Assuming it to be $$25\%$$ efficient in converting electrical energy to light, the number of photons of yellow light it emits per second is:
1. $$1.5\times 10^{20}$$
2. $$6\times 10^{18}$$
3. $$62\times 10^{20}$$
4. $$3\times 10^{19}$$

Subtopic: Â Particle Nature of Light |
Â 70%
From NCERT
AIPMT - 2012
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Which one among the following shows the particle nature of light?

 1 Photoelectric effect 2 Interference 3 Refraction 4 Polarisation
Subtopic: Â Particle Nature of Light |
Â 90%
From NCERT
AIPMT - 2001
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