NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1064 - 1068 of 2184

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Question number: 1064

» Ray Optics » Reflection and Refraction of Light » Smooth Surface

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MCQ▾

Question

A girl stands at a distance 30 cm from the mirror. She is able to see her erect image but of 1/5 height of actual height. The mirror will be:

Choices

Choice (4) Response

a.

Plane convex mirror

b.

Concave mirror

c.

Plane mirror

d.

Convex mirror

Question number: 1065

» Ray Optics » Reflection and Refraction of Light » Spherical Surface

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Assertion-Reason▾

Question

Assertion (Ꭺ)

When an object is placed between two plane parallel mirrors. Then all the images found are of different intensity.

Reason (Ꭱ)

In case of plane parallel mirrors, only two images are possible.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

Question number: 1066

» Ray Optics » Power of a Lens

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MCQ▾

Question

An equiconvex lens has a power of 5 diopter. If it is made of glass of refractive index 1.5 then the radius of the curvature of each surface will be

Choices

Choice (4) Response

a.

10 cm

b.

5 cm

c.

zero

d.

20 cm

Question number: 1067

» Ray Optics » Lens Maker's Formula and Lens Formula

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MCQ▾

Question

In case of thin lens of focal length an object is placed at a distance from first focus and its image is formed at a distance from the second focus, find

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1068

» Ray Optics » Snell's Law

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MCQ▾

Question

A ball is dropped from a height of 20 m above the surface of water in a lake. The refractive index of water is . A fish inside the lake, in the line of fall of the ball, is looking at the ball. At an instant, when the ball is 12.8 m above the water surface, the fish sees the speed of ball is,

Choices

Choice (4) Response

a.

b.

c.

d.