Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 15 - Sample Paper>Exercise>Q 20

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From a point source, light falls on a spherical glass surface $(μ = 1.5$ and radius of curvature $= 10 c m)$ . The distance between point source and glass surface is $50 c m$ . The position of the image is

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 15 - Sample Paper>Exercise>Q 21

The radius of curvature of each surface of a convex lens of refractive index

1.5

is

40 c m

. Calculate the power of this lens.

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 15 - Sample Paper>Exercise>Q 22

A square card of side length

1 m m

is being seen through a magnifying lens of focal length

10 c m

. The card is placed at a distance of

9 c m

from the lens. The apparent area of the card through the lens is:

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 15 - Sample Paper>Exercise>Q 23

A tree of height

2 m

is located

18 m

away from a concave lens. The height of the image formed by the given lens of focal length

6 m

is:

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 15 - Sample Paper>Exercise>Q 24

Light from a point source in air falls on a convex spherical glass surface whose radius of curvature and refractive index are

20 c m

and

1.5

respectively. If the distance of light source from the glass surface is

100 c m

, then the position of image will be formed at:

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 15 - Sample Paper>Exercise>Q 25

A man is trying to start a fire by focusing sunlight on a piece of paper using an equi-convex lens of focal length

10 c m

. The diameter of the sun is

1.39 \times 10^{9} m

and its mean distance from the earth is

1.5 \times 10^{11} m

. The diameter of the sun's image on the paper is (close to)

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 15 - Sample Paper>Exercise>Q 26

The angle of minimum deviation for a prism would be equal to prism angle if the refractive index of the medium of prism is-

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 15 - Sample Paper>Exercise>Q 27

The angle of minimum deviation for an incident light ray on an equilateral prism is equal to its refracting angle. The refractive index of its material is

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 15 - Sample Paper>Exercise>Q 28

A beam of light consists of