Electromagnetic radiation with a wavelength of 589 nm appears as yellow light to the human eye. The energy of one photon of this light is 3.37x10-19J. Thus, a laser that emits 1.3x10-2 of energy in one pulse of light at its wavelength produces (BLANK) photons in each pulse.
A.) 2.6x10-17
B.) 6.5x1013
C). 2.3 x1019
D.) 3.9x1016
E.) 7.4x10-24

Question

23-11-2022
Physics

Answered

Electromagnetic radiation with a wavelength of 589 nm appears as yellow light to the human eye. The energy of one photon of this light is 3.37x10-19J. Thus, a laser that emits 1.3x10-2 of energy in one pulse of light at its wavelength produces (BLANK) photons in each pulse.
A.) 2.6x10-17
B.) 6.5x1013
C). 2.3 x1019
D.) 3.9x1016
E.) 7.4x10-24

Answer :

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contexto38 contexto38 · Answer 1 · 2022-11-28T23:45:39-05:00

Electromagnetic radiation with a wavelength of 589 nm appears as yellow light to the human eye. The energy of one photon of this light is 3.37x10-19J. Thus, a laser that emits 1.3x10-2 of energy in one pulse of light at its wavelength produces (BLANK) photons in each pulse is 3.9 x 10¹⁶

Electromagnetic waves( which include visible light,radio, microwaves etc) carry energy. Each photons( a quantum unit of EM radiation) possess some energy depending on the frequency of the radiation.

The energy of each photon of yellow light is given as-

E=hc/λ

n= energy of laser/energy of one photon

n= E/ El

where E= energy of one photon of the light

El=energy of a laser

λ= wavelength of light

n= no.of photons in each pulse

n=1.3*10-²/3.37*10-¹⁹

n= 3.9*10¹⁶

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