Nature of Electromagnetic Radiation NEET Questions

Physical Chemistry - Atomic Structure

Nature of Electromagnetic Radiation MCQ Questions


7.
The number of waves that pass through a given point in one second is called the:
A.
Wavelength
B.
Velocity
C.
Amplitude
D.
Frequency
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ANSWER :
D. Frequency
8.
The SI unit of frequency is:
A.
Metre (m)
B.
Joule (J)
C.
Second (s)
D.
Hertz (Hz)
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ANSWER :
D. Hertz (Hz)
9.
The maximum height reached by a crest, or the maximum depth reached by a trough, of a wave is called its:
A.
Wavelength
B.
Wavenumber
C.
Amplitude
D.
Frequency
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ANSWER :
C. Amplitude
10.
Which property of a wave determines the intensity (brightness) of electromagnetic radiation?
A.
Wavelength
B.
Wavenumber alone
C.
Amplitude
D.
Frequency alone
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ANSWER :
C. Amplitude
11.
The number of waves per unit length, i.e., the reciprocal of wavelength, is called:
A.
Time period
B.
Wavenumber
C.
Amplitude
D.
Frequency
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ANSWER :
B. Wavenumber
12.
The SI unit of wavenumber is:
A.
s
B.
m⁻¹ (reciprocal metre)
C.
m
D.
Hz
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ANSWER :
B. m⁻¹ (reciprocal metre)