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Standard VIII

Physics

The Sun as Seen from the Earth

Question 1Obs...

Question

Question 1

Observe the picture given in Fig. carefully.

A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?

(a) A wooden board

(b) A glass sheet

(c) A mirror

(d) A sheet of white paper

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Solution

Option (c) is the correct answer.

A patch of light will be formed at the screen when the light from the torch gets reflected from point A and reaches the screen. A mirror is an object that reflects light falling on it. So inorder to get a patch of light, a mirror should be placed at position A.

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Similar questions

Question 1

Observe the picture given in Fig. carefully.

A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?

(a) A wooden board

(b) A glass sheet

(d) A sheet of white paper

Question 2

Classify the objects or materials given below as opaque, transparent or translucent and luminous or non-luminous:

Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, a piece of red-hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet of cellophane, a wire mesh, kerosene stove, sun, Firefly, moon.

Q. The figure below shows a trick in which a lighted candle can be made to appear to be burning in a glass of water.
figure
(a) What must be the distance of the lighted candle from the sheet of glass for this trick to work?
(b) What does the glass do to the light to get this effect?
(c) Which fact about a plane mirror is shown by this trick?

Q. Observe the picture given in Fig. carefully.
A patch of light is obtained at

B

, when the torch is lighted as shown. Which of the following is kept at position

A

to get this patch of light?

Question 9

Observe the picture given in Fig. A sheet of some material is placed at position ‘P’, still, the patch of light is obtained on the screen. What is the type of material of this sheet?

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The Sun as Seen from the Earth

Standard VIII Physics

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Question 1 Observe the picture given in Fig. carefully. A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light? (a) A wooden board (b) A glass sheet (c) A mirror (d) A sheet of white paper

Option (c) is the correct answer. A patch of light will be formed at the screen when the light from the torch gets reflected from point A and reaches the screen. A mirror is an object that reflects light falling on it. So inorder to get a patch of light, a mirror should be placed at position A.

Question 1

Observe the picture given in Fig. carefully.

A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?

(a) A wooden board

(b) A glass sheet

(c) A mirror

(d) A sheet of white paper

Option (c) is the correct answer.

A patch of light will be formed at the screen when the light from the torch gets reflected from point A and reaches the screen. A mirror is an object that reflects light falling on it. So inorder to get a patch of light, a mirror should be placed at position A.