Tag: light, shadows and images

Questions Related to light, shadows and images

You can clearly see through a blue-tinted drinking glass.

  1. True

  2. False


Correct Option: B
Explanation:

Its a translucent object. light partially passes through it.

Wood is an example of opaque object.

  1. True

  2. False


Correct Option: A
Explanation:

No light passes through opaque objects and we can't see through these objects.

For example, wood.

You can clearly see through opaque objects.

  1. True

  2. False


Correct Option: B
Explanation:

It is false that you can clearly see through opaque objects as objects which are seen through are transparent and object which does not allow any light to pass through it are opaque.

Opaque objects:

  1. Allow the light to pass through them

  2. Do not let the light to pass through them

  3. Absorb some amount of light and let the remaining to pass through them

  4. Allows the light from natural sources and rejects if it is from artificial sources


Correct Option: B
Explanation:

The majority of objects are opaque, which means you can't see through them. This is due to the fact that light can't pass through them. Examples of opaque objects include wood, gold, cement, metal, some types of coloured plastic, and so on.

State whether true or false.
In a completely dark room, if you hold up a mirror in front of you, you will still see a reflection of yourself in the mirror.

  1. True

  2. False


Correct Option: B
Explanation:

Since there is no source of light in the room, so reflection can't be seen in the mirror. Th given statement is thus false.

State whether true or false.
The moon is luminous body.

  1. True

  2. False


Correct Option: B
Explanation:

Moon reflects the light of sun and not its own light. So, moon is a non-luminous body.

State whether true or false.
The Sun is a non-luminous object.

  1. True

  2. False


Correct Option: B
Explanation:

Sun is a luminous object since it generates light of its own.

The silvering on the back surface of a mirror can be done by

  1. Silver

  2. Mercury

  3. None

  4. All kind of shiny materials


Correct Option: D
Explanation:

A plane mirror is made from a few mm thick glass plate.one surface of glass plate is polished to a high degree of smoothness which forms the front part of the mirror and the other(back)surface is silvered(I.e painted with silver,mercury or some other material.)

Light is a form of energy.

  1. True

  2. False


Correct Option: A
Explanation:

Light is a form of energy which does not require any medium to travel.

State whether true or false:
Luminous objects emit light on their own.

  1. True

  2. False


Correct Option: A
Explanation:

Luminous objects are the objects which emit light on their own by various change in form energies for example bulb or sun.