Science Test – 22 Apr (Topic-Light)

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Science (Topic-Light) Test

 

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<<Don't worry we wont call its Just for Tracking purpose>>

1 / 13

The optical phenomena, twinkling of stars, is due to
         a. Atmospheric reflection
         b. Total reflection
         c. Atmospheric refraction
         d. Total refraction

2 / 13

Image formed by plane mirror is
         a. Real and erect
         b. Real and inverted
         c. Virtual and erect
         d. Virtual and inverted

3 / 13

Which object does not reflect more light?

A. Polished Surface

B. Shining Surface

C. Unpolished

D. Both A and B

4 / 13

The unit of power of lens is
         a. Metre
         b. Centimeter
         c. Diopter
         d. M-1

5 / 13

In optics an object which has higher refractive index is called
         a. Optically rarer
         b. Optically denser
         c. Optical density
         d. Refractive index

6 / 13

On which theory nature of light depends upon:

A. Wave theory

B. Particle theory

C. Both A and B

D. Only A

7 / 13

An incident ray is:

A. The point at which incident ray falls on the mirror.

B. The ray of light which is sent back by the mirror.

C. The ray of light which falls on the mirror surface.

D. The ray which makes right angle to the mirror surface.

8 / 13

We see the image of our face when we look into the mirror. It is due to:

A. Interference

B. Diffraction

C. Polarisation

D. Reflection

9 / 13

A concave mirror gives real, inverted and same size image if the object is placed
         a. At F
         b. At infinity
         c. At C
         d. Beyond C

11 / 13

Name a metal which is the best reflector of light?

A. Gold

B. Silver

C. Iron

D. Magnesium

12 / 13

Which statement is correct about the laws of reflection:

(i) The incident ray, normal ray and the reflected ray all lie in the same plane.

(ii) The angle of reflection is always equal to the angle of incidence.

(iii) The angle of incidence is equal to the angle formed by normal ray.

(iv) The angle of reflection is equal to 90 degree

A. Both (i) and (ii)

B. Both (ii) and (iii)

C. Both (iii) and (iv)

D. (i), (ii) and (iv) are correct

13 / 13

The image formed on a cinema screen is an example of:

A. Real Image

B. Virtual Image

C. Point Image

D. Plane Image

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