(a)
Order of the
Answer to Problem 1QAP
The electromagnetic waves from lowest to highest wavelength are Gamma ray, Ultraviolet ray, Red light, Infrared light and Microwaves.
Explanation of Solution
Given:
The given electromagnetic waves are microwaves, red light, ultraviolet light, infrared light and gamma rays.
The wavelength of the given electromagnetic waves has given in table below.
Electromagnetic waves | Wavelength (m) |
Microwave | |
Red light | |
Ultraviolet light | |
Infrared light | |
Gamma ray | |
Conclusion:
From the above table, the electromagnetic waves from lowest to highest wavelength are
Gamma ray, Ultraviolet ray, Red light, Infrared light and Microwaves.
(b)
The highest energy and lowest energy per photon out of the given electromagnetic waves.
Answer to Problem 1QAP
The gamma ray has highest energy per photon and microwaves has lowest energy per photon.
Explanation of Solution
Introduction:
The energy per photon can be determined by Einstein's photo electric equation which is given by
Where ' E' is the energy, ' c' is the velocity of light, ' h' is plank constant and '
The energy is inversely proportional to the wavelength. As wavelength is more energy is less and vice versa.
The given electromagnetic waves are microwaves, red light, ultraviolet light, infrared light and gamma rays and the wavelength of the given electromagnetic waves has given in table below.
Electromagnetic waves | Wavelength (m) |
Microwave | |
Red light | |
Ultraviolet light | |
Infrared light | |
Gamma ray | |
So, in the given electromagnetic waves, the gamma ray has lowest wavelength. So, the energy per photon of gamma ray has highest value. The microwave has highest wave length so it has lowest energy per photon.
Conclusion:
Thus, the gamma ray has highest energy per photon and microwaves has lowest energy per photon.
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Chapter 22 Solutions
COLLEGE PHYSICS-ACHIEVE AC (1-TERM)
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