Nature of Electromagnetic Radiation NEET Questions

Physical Chemistry - Atomic Structure

Nature of Electromagnetic Radiation MCQ Questions


13.
Which of the following is the correct relationship between the velocity (c), frequency (ν), and wavelength (λ) of an electromagnetic wave?
A.
c = νλ
B.
c = λ/ν
C.
c = ν/λ
D.
c = ν + λ
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ANSWER :
A. c = νλ
14.
For a given electromagnetic wave travelling with a constant speed, wavelength and frequency are related as:
A.
Inversely proportional to each other
B.
Directly proportional to each other
C.
Equal to each other
D.
Independent of each other
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ANSWER :
A. Inversely proportional to each other
15.
Which units are commonly used to express the wavelength of electromagnetic radiation?
A.
Kelvin (K) and Celsius (°C)
B.
Joule (J) and kilojoule (kJ)
C.
Hertz (Hz) and kilohertz (kHz)
D.
Angstrom (Å), nanometre (nm), or picometre (pm)
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ANSWER :
D. Angstrom (Å), nanometre (nm), or picometre (pm)
16.
1 angstrom (Å) is equal to how many metres?
A.
10⁻¹⁰ m
B.
10⁻⁶ m
C.
10⁻¹² m
D.
10⁻⁹ m
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ANSWER :
A. 10⁻¹⁰ m
17.
1 nanometre (nm) is equal to how many metres?
A.
10⁻⁶ m
B.
10⁻¹⁰ m
C.
10⁻⁹ m
D.
10⁻³ m
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ANSWER :
C. 10⁻⁹ m
18.
The speed of electromagnetic radiation (light) in vacuum is approximately:
A.
3 × 10¹⁰ m/s
B.
3 × 10⁶ m/s
C.
3 × 10⁵ m/s
D.
3 × 10⁸ m/s
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ANSWER :
D. 3 × 10⁸ m/s