Ray Optics (NEET Physics): Questions 64 - 66 of 102

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Question number: 64

» Ray Optics » Snell's Law

MCQ▾

Question

A ray of monochromatic light is incident on the plane surface of separation between two media x and y with angle of incidence i in the medium x and angle of refraction r in the medium y. The graph shows the relation between sin i and sin r.

Graph of sin r→sin i

Graph of Sin R→Sin I

In figure the graph shows the relation between sin i and sin r.

(1) The speed of light in the medium y is 3 times than in medium x

(2) The speed of light in the medium y is 13 times than in medium x.

(3) The total internal reflection can take place when the incidence is in x.

(4) The total internal reflection can take place when the incidence is in y

Select the correct answers and mark it according to the following codes:

Codes:

Choices

Choice (4) Response
a.

1, 2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct

Question number: 65

» Ray Optics » Magnification

MCQ▾

Question

A 0.2 cm high object is placed 15 cm from a concave mirror of focal length 5 cm. Find position and size of the image.

Choices

Choice (4) Response
a.

7.5 cm, 0.1 cm.

b.

7.5 cm, 0.4. cm.

c.

7.5 cm, 0.4 cm.

d.

10.0 cm, 0.5 cm.

Question number: 66

» Ray Optics » Mirror Formula

MCQ▾

Question

A particle is moving at a constant speed v0 from a large distance towards a concave mirror of radius R along its principle axis, Find the speed of the image formed by the mirror as a function of the distance u of the particles from the mirror.

Choices

Choice (4) Response
a.

(2R2uR)2v0

b.

(R2uR)2v0

c.

(R2u+R)2v0

d. All of the above

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