Wave Optics

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Question

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Question 1 :

Defect of hypermetropia can be remedied by the use of:

1. cylindrical lens
2. concavo-convex lens
3. convex lens
4. concave lens
Answer
4769

Question 2 :

When an object is placed between two parallel mirrors, then number of images formed is

1. 2
2. 4
3. 8
4. infinite
Answer
4770

Question 3 :

The region of retina in which the vision is most acute is:

1. conjuctiva
2. ciliary body
3. forea centralis
4. vitreous humour
Answer
4771

Question 4 :

The velocity of light in air is 3 x 10⁸  m s^-1 and the     velocity of light in a medium is 2 x 10⁸  m s^-1 . The critical angle for the   pair is sin^-1

1. 2/3
2. 1/2
3. 1/3
4. 3/2
Answer
4772

Question 5 :

A bird in air looks at a fish vertically below it and inside water in a tank, μ is the refractive index of water. The distance of the fish as estimated by the bird is:

1. x/yμ
2. x + (y/μ)
3. μ/xy
4. x - (y/μ)
Answer
4773