2- A police radar unit is operating on a frequency of 9.527 GHz. What is the wavelength of the radiation being employed? a. 314.7 nm b. 314.7 m c. 314.7 cm d. 3.147 cm

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Chapter7: Work, Energy, And Energy Resources
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1- Which one of the following types of radiation has the lowest frequency?
a. infrared radiation
b. microwave radiation
с. X-гаys
d. FM radio waves
2- A police radar unit is operating on a frequency of 9.527 GHz. What is the wavelength of the
radiation being employed?
a. 314.7 nm
b. 314.7 m
c. 314.7 cm
d. 3.147 cm
3- A blackbody radiator
(A) does not absorb thermal radiation.
(B) is a perfectly reflecting surface.
(D) emits radiation only in the visible light region.
(C) none of the above.
4- Which of the following colors indicates an object of the lowest temperature?
(A) Violet
(В) Blue
(C) Yellow
(D) Red
5- How does the energy of a photon change if the wavelength is doubled?
(A) Energy doubles
(B) Energy quadruples
(C) Energy stays the same
(D) Energy is halved
6- A photon with energy of one electron volt (1 eV) has a wavelength of:
(a) 1.24 x 10-² cm
(b) 3720 angstroms
(с) 3.0 x 103 cm
(d) 1240 nm
Transcribed Image Text:1- Which one of the following types of radiation has the lowest frequency? a. infrared radiation b. microwave radiation с. X-гаys d. FM radio waves 2- A police radar unit is operating on a frequency of 9.527 GHz. What is the wavelength of the radiation being employed? a. 314.7 nm b. 314.7 m c. 314.7 cm d. 3.147 cm 3- A blackbody radiator (A) does not absorb thermal radiation. (B) is a perfectly reflecting surface. (D) emits radiation only in the visible light region. (C) none of the above. 4- Which of the following colors indicates an object of the lowest temperature? (A) Violet (В) Blue (C) Yellow (D) Red 5- How does the energy of a photon change if the wavelength is doubled? (A) Energy doubles (B) Energy quadruples (C) Energy stays the same (D) Energy is halved 6- A photon with energy of one electron volt (1 eV) has a wavelength of: (a) 1.24 x 10-² cm (b) 3720 angstroms (с) 3.0 x 103 cm (d) 1240 nm
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