NCERT Class X Science Class: Chapter –10. Light – Reflection and Refraction – Part-1

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Multiple Choice Questions

Question 1:

Which of the following can make a parallel beam of light when light from a point source is incident on it?

(a) Concave mirror as well as convex lens

(b) Convex mirror as well as concave lens

(c) Two plane mirrors placed at to each other

(d) Concave mirror as well as concave lens

Answer: A

Image concave mirror and convex lens

Image Concave Mirror and Convex Lens

Image concave mirror and convex lens

Question 2:

A long awl pin is placed vertically in front of a concave mirror. A long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

(a)

(b)

(c)

(d)

Answer: B

Question 3:

Under which of the following conditions a concave mirror can form an image larger than the actual object?

(a) When the object is kept at a distance equal to its radius of curvature

(b) When object is kept at a distance less than its focal length

(c) When object is placed between the focus and center of curvature

(d) When object is kept at a distance greater than its radius of curvature

Answer: C

Image Object placed between focus and COC

Image Object Placed between Focus and COC

Image Object placed between focus and COC

Question 4:

Image Light ray travels from A to B

Image Light Ray Travels from a to B

Image Light ray travels from A to B

Figure shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is

(a)

(b)

(c)

(d)

Answer: A

Question 5:

Image Light ray enters from A to B

Image Light Ray Enters from a to B

Image Light ray enters from A to B

A light ray enters from medium A to medium B as shown in Figure. The refractive index of medium B relative to A will be

(a) Greater than unity

(b) less than unity

(c) Equal to unity

(d) Zero

Answer: B

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