Reflection

Q.

What is an image?

Q.

Reflection of light takes place when light falls on:

1. Both translucent and opaque objects

2. Transparent objects

3. Translucent objects

4. Opaque objects

Q. Explanation of and an example of regular and irregular reflection.

Q.

Name the best reflector of light.

Q. The phenomenon in which light rays bounce back in the same medium is known as _________.

1. Reflection
2. Dispersion
3. Interference
4. Refraction

Q. The change in the path of light after striking a mirror is called

1. shadow
2. refraction
3. reflection
4. displacement

Q. What is the reflection of light? Explain reflection of light with the help of an activity. [5 MARKS]

Q.

The moon reflects the light of the sun, hence it is a/an ______ (illuminating/luminous) object.

Q. The phenomenon of bouncing back of light is called .

1. diffraction
2. reflection
3. dispersion
4. absorption

Q. A change in the path of light after striking a mirror is called .

1. curving
2. displacement
3. reflection
4. shadow

Q.

Irregular reflection occurs from a_____ surface.

Q.

Question 7

Two students while sitting across a table looked down on to its top surface. They noticed that they could see their own and each other’s image. The table top is likely to be made of:

(a) Unpolished wood

(b) Red stone

(c) Glass sheet

(d) Wood top covered with cloth

Q.

Are all luminous objects opaque?

Q. Arrange the following events in a chronological order.

1. Light from a source
2. Object reflects light
3. Reflected light enters our eye
4. Image formation
5. Light falls on an object

Q.

How can we protect our eyes while looking at a strong source of light?

1. All of these

2. By placing our hand in front of our eyes

3. By not looking at directly

4. By putting opaque thing in front of your eyes

Q.

Match the words in column A with those in column B.

Column 1	Column 2
Shadow	Laterally inverted, not upside down.
Reflected image	Laterally inverted, upside down
Image in a pinhole camera	Black, not inverted

Q.

To see an object, which of the following things we do we not need?

1. Source of light

2. Object

3. Eyes

4. Mirror

Q.

From the given options, choose the one which is not needed to see an object.

1. Source of light

2. Object

3. Eyes

4. Mirror

Q. _________ of light is the phenomenon of bouncing back of light.

1. Dispersion
2. Refraction
3. Reflection
4. Absorption

Q.

Bouncing back of light in a given medium after striking a surface is called ______.

Q.

The image formed by a plane mirror is as far behind the mirror as the object is in ………… of it.

Q. Choose the correct statement(s) regarding image formation in a plane mirror?

1. To get a diminished image, we would require a significantly smaller mirror.
2. To get an enlarged image, we would require a significantly larger mirror.
3. Size of the mirror does not affect the size of the image.
4. Only size of the object determines the size of the image.

Q. Which of the following is not a necessary requirement to see an object?

1. Light
2. Object
3. Eyes
4. Mirror

Q. Objects through which light cannot pass are called _____ objects.

1. transparent
2. translucent
3. opaque
4. luminous

Q.

What is reflection?

Q.

___ objects allow light, to pass through them partially.

1. Translucent

2. Wood

3. Metal

4. Opaque

Q. Choose the odd one out on the basis of capacity to transmit light.

1. Glass
2. Cardboard
3. Metal sheet
4. Wooden block

Q.

The word 'AMBULANCE' written on an ambulance reads correctly when reflected in a rear view mirror whereas the number plate does not. Why?

1. 'AMBULANCE' is written laterally inverted.

2. 'ECNALUBMA' reads 'AMBULANCE' when read through mirror.

3. Rear view mirror is a concave mirror.

4. Number plate is written laterally inverted.

Q. Which phenomenon explains the formation of image of trees in a river?

1. Rectilinear propagation

2. Splitting of white light

3. Reflection

4. Opacity

Q.

The image formed by the pinhole camera is always upside down.

1. True
2. False