Ray Optics (KVPY Stream-SA (Class 11) Physics): Questions 4 - 6 of 26

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Question number: 4

» Ray Optics » Reflection and Refraction of Light

Appeared in Year: 2010

Short Answer Question▾

Write in Short

A point source is placed 20 cm to the left of a concave lens of focal length 10 cm.

(a) Where is the image formed?

(b) Where to the right of the lens would you place a concave mirror of focal length 5 cm such that the final image is coincident with the source?

Question number: 5

» Ray Optics » Deviation and Dispersion of Light by a Prism

Appeared in Year: 2010

MCQ▾

Question

White light is split into a spectrum by a prism and it is seen on a screen. If we put another identical inverted prism behind it in contact, what will be seen on the screen?

Choices

Choice (4) Response

a.

There will be no spectrum, but only the original light with no deviation

b.

The spectrum will remain the same

c.

There will be no spectrum, but the original light will be largely displaced

d.

Violet will appear where red was

Question number: 6

» Ray Optics » Mirror Formula

Appeared in Year: 2013

MCQ▾

Question

A horizontal parallel beam of light passes through a vertical convex lens of focal length 20 cm and is then reflected by a tilted plane mirror so that it converges to a point I. The distance PI is 10 cm.

A beam of light passes through a convex lens and a mirror.

A Beam of Light Passes Through a Convex Lens and a Mirror.

Figure shows a horizontal parallel beam of light passes through a vertical convex lens of focal length 20 cm and is then reflected by a tilted plane mirror so that it converges to a point I.

M is a point at which the axis of the lens intersects the mirror. The distance PM is 10 cm. The angle which the mirror makes with the horizontal is,

Choices

Choice (4) Response

a.

15°

b.

45°

c.

60°

d.

30°

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