Light reflection and refraction

1.

Multiple Choice

30 sec

1 pt

Bending of light when it passes from one medium to another is called

Disturbance

Reflection

Refraction

None of the above

2.

Multiple Choice

30 sec

1 pt

Coming back of light rays to the same medium when they fall on a body is known as

Refraction

Reflection

Both

None of the above

3.

Multiple Select

45 sec

1 pt

The ratio of sine of angle of incidence to the Sine of angle of refraction is is a a constant for a given pair of media

Second law of refraction

Snell's law

Law of reflection

All of the above

4.

Multiple Choice

30 sec

1 pt

Second law of reflection states that angle of incidence and angle of reflection is

Always equal

Never equal

Sometime equal

None of the above

5.

Multiple Choice

30 sec

1 pt

What kind of image can be obtained on a screen

Real image

Virtual image

Both

None of the above

6.

Multiple Choice

30 sec

1 pt

Which mirror convex or concave has larger field of view?

Concave mirror

Convex mirror

Both

None of the above

7.

Multiple Choice

30 sec

1 pt

What sign is given to the focal length of a concave mirror

Positive sign

Negative sign

Any one positive or negative

8.

Multiple Choice

30 sec

1 pt

A medium in which light travels comparatively faster than the other medium is called an

Optically denser medium

Optically rarer medium

Optical liquid medium

Optical solid medium

9.

Multiple Choice

30 sec

1 pt

Refractive index of a medium with respect to vacuum is called

Relative refractive index

Absolute refractive index

Advanced refractive index

None of the above

10.

Multiple Choice

30 sec

1 pt

What is the cause of refraction of light?

Because the speed of light is different in different media

Because light travels with same speed in any medium

Light travels with same velocity

All of the above

11.

Multiple Choice

30 sec

1 pt

In which direction A Ray of light bends when it goes from water to glass?

Away from normal

Towards the normal

No change in path

None of the above

12.

Multiple Select

2 mins

1 pt

An object is placed at a distance of 12cm in front of a concave mirror of radius of curvature 30cm .Tick the .characteristics of the image formed by the mirror.

Virtual

Erect

Diminished

Inverted

13.

Multiple Choice

30 sec

1 pt

A convex lens has a focal length of 10cm . What is its power?

+1 diopter

+10 diopter

-5 diopter

-25 diopter

14.

Multiple Choice

30 sec

1 pt

Converging lens

Concave lens

Convex lens

Both lenses

None of the above

15.

Multiple Choice

30 sec

1 pt

If an object is placed at the focus of a concave mirror where is the image formed

At infinity

At focus

At centre of curvature

Beyond c

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