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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Question
if all the energy from a 93 W light bulb ?is emmited on average at 530.0 nm, how many 530.0 nm photons must be emitted each second to account for all 93w
Expert Solution
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Step 1
Given Data:-
Power of the bulb is
Wavelength of each photon is
Required:-
We need to calculate the number of photons emitted per second on account of 93 W.
Formula:-
Energy of a photon having frequency is
is the Planck's constant.
is the wavelength of the photon and c is the speed of light in free space.
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- Energy مثل n=3 n = 2 n=1 مشا R A photon Pis absorbed by an electron in the ground state, and it jumps up to the n=3 energy level. It then quickly emits two photons, Q and R, as the electron returns to the ground state. What are the frequencies of these three photons P, Q, and R?arrow_forwardMY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A solid metal sphere emits 1.62 x 1020 photons every second with a radiating power of 1.93 W. (a) Determine the energy associated with each photon. eV (b) Assuming the sphere's power output is associated with the peak wavelength, determine the temperature of the sphere at which this wavelength is emitted. K Additional Materials O Readingarrow_forwardOne of the first signs of sunburn is the reddening of the skin (called erythema). As a very rough rule of thumb, erythema occurs if 14.0 mJ of ultraviolet light of approximately 308 nm wavelength (referred to as UVB radiation) is incident on the skin per square centimeter during a single exposure. How many photons are incident on 1.00 cm2 of skin in this amount of exposure? photonsarrow_forward
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