NSTSE (National Science Talent Search Exam- Unified Council) Class 10: Questions 1027 - 1032 of 1484

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Question number: 1027

» Physics » Light

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MCQ▾

Question

In an optical instrument, if we replaced lens having focal length of the lens becomes times than original lens, then its power of the instrument is charged by factor:

Choices

Choice (4) Response

a.

b.

3

c.

6

d.

Question number: 1028

» Physics » Light

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MCQ▾

Question

A converging lens has a focal length of . If an object is placed from the centre of lens, then image is:

Choices

Choice (4) Response

a.

Real, Erect, Enlarged

b.

Real, Inverted, Diminished

c.

Real, Erect, Same height

d.

Virtual, Inverted, Same height

Question number: 1029

» Physics » Light

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MCQ▾

Question

Which of the following mirror is used for focusing light?

Choices

Choice (4) Response

a.

Concave

b.

Convex

c.

Plane mirror

d.

Plane-convex mirror

Question number: 1030

» Physics » Light

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MCQ▾

Question

Observe the following figure, in which parallel light rays of a concave lens.

Diverging lens

Diverging Lens

In figure diverging lens is shown.

Which point is called the focal point of the concave lens?

Choices

Choice (4) Response

a.

R

b.

S

c.

Q

d.

P

Question number: 1031

» Physics » Light

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MCQ▾

Question

If a ray of light incident with angle from air to surface of a medium, and angle of refracting is , then refractive index of the medium is:

Choices

Choice (4) Response

a.

4

b.

c.

d.

Question number: 1032

» Physics » Light

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MCQ▾

Question

Which of following phenomena of light is cause of a drop of water appears like pearl?

Choices

Choice (4) Response

a.

Total internal reflection

b.

Dispersion

c.

Refraction

d.

Reflection

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