Reflection of Light

Q.

Why mirror reflects light

Q.

Which of the following materials allows light to pass through it?

1. Transparent

2. Translucent

3. Opaque

4. Prism

Q.

Is the given assertion correct, the magnification of a convex mirror is always positive but that of a concave mirror may be both positive or negative?

Q.

The laws of reflection hold true for:

1. Plane mirrors only

2. Concave mirrors only

3. Convex mirrors only

4. All reflecting surfaces

Q. All stars are luminous in nature.

1. none of these

2. Non-luminous

Q.

We can see objects when the light is reflected from the objects and it falls upon our eyes. Why can't walls act as a mirror since even walls reflect light which falls on our eyes? [3 MARKS]

Q.

We know that shiny, well polished surfaces like mirror reflect light well. We can also see our reflection in still water because it acts like a mirror. So if I make a laser light or any torch light fall on still water, will it reflect light? Plz explain the answer

Q.

Instead of seeing our face in plane mirror when we see in transparent glass , What happens?Does it reflect our face?

Q. Plane mirror is _____ mirror.

1. a convergent
2. a divergent
3. either a convergent or a divergent
4. neither a convergent nor a divergent

Q. Statement 1: A concave mirror can converge a parallel beam of light to a point.
Statement 2: The reflection taking place in the above statement is a regular reflection.

1. Only statement 1 is false
2. Only statement 2 is false
3. Both statements are true
4. Both statements are false

Q.

We are able to see a chair kept in a room due to reflection.

1. True

2. False

Q.

We can see objects when the light is reflected from the objects and it falls upon our eyes. Why can't walls act as mirror since even walls reflect light which falls on our eyes? [3 MARKS]

Q.

A diamond shines a lot more than a graphite. What can we infer from this information?

1. Diamond is a better reflector of light than graphite.

2. Diamond is a better absorber of light than graphite.

3. Diamond is a better emitter of light than graphite.

4. Diamond is more transparent than graphite.

Q.

In a dark night, how does a torch enables us to see objects?

1. A torch directs the light emitting from the object to our eyes.

2. Our eyes reflects the light emitting from the torch towards the object.

3. Light emitting from the torch falls on our eyes after being reflected by the object.

4. Light from our eyes illuminates the object after being reflected by the torch.

Q.

Which of the following is/are the luminous object(s)?

1. Sun

2. Moon

3. Mars

4. Human

Q. Write true or false for this statement:
An electromagnet with soft iron core is a temporary magnet.

1. False
2. True

Q.

A medium which allows the ray of light to pass through it is known as transparent medium.

1. True
2. False

Q.

What will happen when a beam of light strikes a smooth marble floor?

1. Regular reflection takes place

2. Diffused reflection takes place

3. Dispersion takes place

4. Refraction takes place

Q.

The change in path of a light ray after striking a mirror is called ___.

1. dispersion

2. both dispersion and refraction

3. refraction

4. reflection

Q. What are the properties of :-
(a) A concave mirror
(b) A convex mirror
(c) A plane mirror

Q. Which of the following materials causes regular reflection of incident light?

1. Heap of sugar crystals
2. Polished steel plate
3. Plane mirror
4. Rubber mat

Q.

Things become visible due to

Q. A glass sheet has a very faint shadow. What inference can we draw from this information?

1. Glass sheet allows most of the incident rays to pass through it.
2. Glass sheet absorbs most of the incident rays.
3. Glass sheet reflects back most of the incident rays.
4. Glass sheet either reflects or absorbs most of the incident rays.

Q.

We can see without light.

1. True
2. False

Q.

Write a short note on colour subtraction.

Q.

The type of object that doesn't cast shadow is known as ___ object.

Q.

Explain the terms below with help of a diagram.

(a) Incident ray

(b) Reflected ray

(c) Normal

(d) Angle of incidence

(e) Angle of reflection

Q.

Observe the picture given in figure 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? (b) A glass sheet (c) A mirror (d) A sheet of white paper,

Source of light

Q.

In which of the following, does diffused reflection take place when a beam of light strikes it?

1. Mirror

2. Polished wooden table

3. Chalk powder

4. Marble floor with water spread on it

Q.

1. A plane mirror is also known as a convergent mirror.
2. It is also able to converge images.

1. Only Statement 1 is true

2. Both the statements are false

3. Statement 1 is false and statement 2 is true

4. Both statements are true