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Rectilinear propagation of Light

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1. What type of propagation does light exhibit when it travels in a straight line?

a) Circular

b) Rectilinear

c) Sinusoidal

d) Parabolic

2. What type of lens is used to correct nearsightedness?

a) Concave

b) Convex

c) Plano-convex

d) Plano-concave

3. How does the angle of incidence affect the angle of refraction in a prism?

a) The angle of incidence is directly proportional to the angle of refraction

b) The angle of incidence is inversely proportional to the angle of refraction

c) The angle of incidence has no effect on the angle of refraction

d) The angle of incidence and the angle of refraction are always equal

4. What type of mirror is used in a periscope?

a) Plane

b) Concave

c) Convex

d) Spherical

5. What is the critical angle for total internal reflection in a medium with a refractive index of 1.5?

a) 45 degrees

b) 60 degrees

c) 75 degrees

d) 90 degrees

6. What is the difference between a ray and a beam of light?

a) A ray is a single photon, while a beam is a group of photons

b) A ray is a straight line, while a beam is a curved path

c) A ray is a narrow line of light, while a beam is a wide area of light

d) A ray is a theoretical concept, while a beam is a physical phenomenon

7. What is the term for the bending of light as it passes through a medium with a varying refractive index?

a) Dispersion

b) Refraction

c) Diffraction

d) Interference

8. What is the term for the separation of light into its constituent colors?

a) Dispersion

b) Refraction

c) Diffraction

d) Interference

9. What type of lens is used in a microscope to magnify small objects?

a) Concave

b) Convex

c) Plano-convex

d) Plano-concave

10. What is the difference between a real image and a virtual image?

a) A real image is inverted, while a virtual image is upright

b) A real image can be projected onto a screen, while a virtual image cannot

c) A real image is formed by diverging light rays, while a virtual image is formed by converging light rays

d) A real image is formed by converging light rays, while a virtual image is formed by diverging light rays

Answers:

    1. B
    2. B
    3. B
    4. A
    5. B
    6. C
    7. B
    8. A
    9. D
    10. D

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    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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