NCERT Class VIII Science Solutions: Chapter 16-Light Part 2

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Question 4:

A tiny mirror M is fixed on a piece of cardboard placed on a table. The cardboard is illuminated by light from a bulb. The position of eye with respect to position of bulb is shown in Fig as A, B, C and D. In which position mirror will be visible?

As showing in fig is a position mirror will be visible

In Which Position Mirror Will Be Visible

As showing in fig is a position mirror will be visible

  1. A

  2. B

  3. C

  4. D

Answer: A

Question 5:

A small hole P is made in a piece of cardboard. The hole is illuminated by a torch as shown in Fig. The pencil of light coming out of the hole falls on a mirror.

As showing in fig is a piece of cardboard.

Piece of Cardboard.

As showing in fig is a piece of cardboard.

At which point should the eye be placed so that the hole can be seen?

  1. A

  2. B

  3. C

  4. D

Answer: A

Question 6:

Two mirrors A and B are placed at right angles to each other as shown in Fig.

As showing in fig is a angle of reflection

Angle of Reflection

As showing in fig is a angle of reflection

A ray of light incident on mirror A at an angle of falls on mirror B after reflection. The angle of reflection for the ray reflected from mirror B would be

Answer: C