The energy of a quanta of frequency ${10}^{15}$ Hz and  will be:

1.

$\mathrm{}$2.

3.

$\mathrm{}$4.

Subtopic:  Particle Nature of Light |
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The spectrum of radiation 1.0 x 1014 Hz is in the infrared region. The energy of one photon of this in joules will be:

1. $6.62×{10}^{-48}$
2. $6.62×{10}^{-20}$
3. $\frac{6.62}{3}×{10}^{-28}$
4. $3×6.62×{10}^{-28}$

Subtopic:  Particle Nature of Light |
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A helium-neon laser produces monochromatic light of a wavelength of 667 nm. The power emitted is 9 mW. The average number of photons arriving per second on average at a target irradiated by this beam is:

1. $9×{10}^{17}$

2. $3×{10}^{16}$

3. $9×{10}^{15}$

4. $3×{10}^{19}$

Subtopic:  Particle Nature of Light |
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A source S1 is producing, 1015 photons per sec of wavelength 5000 Å. Another source S2 is producing 1.02×1015 photons per second of wavelength 5100 Å. Then the ratio of the power of S2 to the power of S1 is equal to:

1. 1.00

2. 1.02

3. 1.04

4. 0.98

Subtopic:  Particle Nature of Light |
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A 200 W sodium street lamp emits yellow light of wavelength 0.6 $\mathrm{\mu m}$. If it is 25% efficient in converting electrical energy to light, how many photons of yellow light does it emit per second?

1. $1.5×{10}^{20}$

2. $6×{10}^{18}$

3. $62×{10}^{20}$

4. $3×{10}^{19}$

Subtopic:  Particle Nature of Light |
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Monochromatic light of frequency 6.0×1014 Hz is produced by a laser. The power emitted is 2×10-3 W. What will be the average number of photons emitted by the source per second?

1. $5×{10}^{15}$

2. $5×{10}^{16}$

3. $5×{10}^{17}$

4. $5×{10}^{14}$

Subtopic:  Particle Nature of Light |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh