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Wave Nature of Light

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1. What type of wave is light considered to be?

a) Transverse

b) Longitudinal

c) Mechanical

d) Electric

2. What is the speed of light in a vacuum?

a) 299,792,458 m/s

b) 299,792,458 km/s

c) 299,792,458 ft/s

d) 299,792,458 mph

3. What is the wavelength of light in the visible spectrum?

a) 400-700 nm

b) 700-1000 nm

c) 1000-1400 nm

d) 1400-1700 nm

4. What is the frequency of light in the red region of the visible spectrum?

a) 400-700 THz

b) 700-1000 THz

c) 1000-1400 THz

d) 1400-1700 THz

5. What type of electromagnetic radiation has the longest wavelength?

a) Gamma rays

b) X-rays

c) Ultraviolet

d) Radio waves

6. How does the speed of light change when it travels through a medium?

a) It remains constant

b) It increases

c) It decreases

d) It fluctuates

7. What is the difference between coherent and incoherent light?

a) Coherent light has a fixed phase while incoherent light does not

b) Coherent light is polarized while incoherent light is not

c) Coherent light has a fixed frequency while incoherent light does not

d) All of the above

8. What is the principle of superposition?

a) The principle that states that the amplitude of a wave is the sum of the amplitudes of the individual waves

b) The principle that states that the speed of light is constant

c) The principle that states that the wavelength of light is inversely proportional to its frequency

d) The principle that states that light can be both a wave and a particle

9. What is the difference between a transverse wave and a longitudinal wave?

a) Transverse waves have oscillations perpendicular to the direction of propagation while longitudinal waves have oscillations parallel to the direction of propagation

b) Transverse waves have oscillations parallel to the direction of propagation while longitudinal waves have oscillations perpendicular to the direction of propagation

c) Transverse waves have a fixed wavelength while longitudinal waves do not

d) Transverse waves have a fixed frequency while longitudinal waves do not

10. What is the purpose of a diffraction grating?

a) To separate different wavelengths of light

b) To increase the intensity of light

c) To change the phase of light

d) To polarize light

Answers:

    1. a
    2. a
    3. a
    4. d
    5. d
    6. c
    7. d
    8. a
    9. a
    10. a

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    Multiple Choice Questions (MCQs)

    The UPSC (Union Public Service Commission) Prelims exam is the first step in the selection process for the Indian Administrative Service (IAS), Indian Foreign Service (IFS), and Indian Police Service (IPS) among other civil services in India. The exam consists of two papers: General Studies Paper 1 and General Studies Paper 2 (also known as the Civil Services Aptitude Test or CSAT). The General Studies Paper 1 is worth 200 marks and is comprised of multiple choice questions (MCQs). The exam tests the candidate's knowledge of current events, Indian and World history, Indian and World geography, Indian polity and governance, economic and social development, general science and environmental ecology and biodiversity.

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