Transparent

Q.

Why do opaque objects cast a shadow, while transparent and translucent objects don't?

Q.

By giving three examples, define luminous bodies.

Q. Lens is a transparent object.

1. False
2. True

Q. Air is a/an_____________medium.

1. translucent medium

2. transparent medium

3. None of the above

4. opaque medium

Q.

___________ objects emit their own light, ___________ objects do not emit their own light.

Q.

A thin layer of water is transparent but a very thick layer of water is

1. translucent

2. opaque

3. most transparent

4. none of these

Q.

The bodies which give _________ energy of their own, are called luminous bodies.

Q.

Which of the following are not luminous objects?

1. Moon

2. Sun

3. Bird

4. Firefly

Q. When light is incident on object A and object B, object A casts a shadow on a screen whereas object B does not. Which of the following is/are true?

1. Object A is a transparent object.
2. Object B is an opaque object.
3. Object A is an opaque object.
4. Object B is a transparent object.

Q. Which type of objects cannot cast a shadow?

1. Opaque
2. Translucent
3. Transparent

Q.

1. True
2. False

Q.

The bodies which give .......................... energy of their own, are called luminous bodies.

Q.

Objects that produce their own light

Q. What are luminous objects? Give two examples.

Q. Choose the transparent and translucent objects.

1. Glass panel
2. Pure water
3. Wood
4. Butter paper
5. Mirror
6. Plastic sheet
7. Cardboard
8. Wax paper

Q. Assertion :A butter paper acts as a translucent medium for light. Reason: Translucent substances allow only a part of light through them.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Q. Choose the transparent and the translucent objects.

1. Wood
2. Clear glass
3. Mirror
4. Air
5. Butter paper
6. Smoke
7. Black board
8. Pure water

Q. Which among the following objects is transparent?

1. Thick plastic sheet
2. Wooden block
3. Clear glass
4. Wax paper