# 7th Class Science Lights and Sound Question Bank

### done Light

• A) A plane mirror sometimes forms an inverted image.

B) A concave mirror always forms a virtual, erect and diminished image.

C) A concave lens always forms a virtual, erect and diminished image.

D) All of the above

View Answer play_arrow
• A) A prism

B) A plane mirror

C) A concave mirror

D) A convex lens

View Answer play_arrow
• A) Electric lamp

B) Tube light

C) Torch

D) The sun

View Answer play_arrow
• A) Curvilinear

B) Rectilinear

C) Random

D) Circular

View Answer play_arrow
• A) Travelling in curved lines

B) Travelling in straight lines

C) The ability to bend around obstacles

D) The display of the phenomenon of diffraction

View Answer play_arrow
• A) An object that can absorb light

B) An object that can reflect light

C) An object that can refract light

D) An object that can emit light

View Answer play_arrow
• A) The sun

B) The moon

C) The star

D) The filament

View Answer play_arrow
• A) Rectilinear propagation of light

B) Curvilinear propagation of light

C) Total internal reflection

D) Refraction

View Answer play_arrow
• A) Convergent

B) Divergent

C) Parallel

D) Irregular

View Answer play_arrow
• A) Ray

B) Beam

C) Twilight

D) Sunlight

View Answer play_arrow
• A) $30{}^\circ$

B) $60{}^\circ$

C) $90{}^\circ$

D) $120{}^\circ$

View Answer play_arrow
• A) A single colour

B) Primary colours

C) Five colours

D) Seven colours

View Answer play_arrow
• A) Everything is black in colour.

B) Our eyes do not work in darkness.

C) No light reaches our eyes.

D) All the light gets scattered.

View Answer play_arrow
• A) Rough surface

B) Ideal surface

C) Smooth surface

D) Curved surface

View Answer play_arrow
• A) Light absorbed by an object

B) Light that enters our eyes after it is reflected by an object

C) Light dispersed by an object

D) Light refracted through the object

View Answer play_arrow
• A) $80{}^\circ$

B) $100{}^\circ$

C) $160{}^\circ$

D) $20{}^\circ$

View Answer play_arrow
• A) Convex mirror

B) Convex lens

C) Plane mirror

D) Concave mirror

View Answer play_arrow
• A) $50{}^\circ$

B) $100{}^\circ$

C) $130{}^\circ$

D) $80{}^\circ$

View Answer play_arrow
• A) Concave lens

B) Convex mirrors

C) Plane mirrors

D) Convex lenses

View Answer play_arrow
• A) Concave mirrors

B) Plane mirrors

C) Convex mirrors

D) Concave lens

View Answer play_arrow
• A) Red

B) Yellow

C) Blue

D) Green

View Answer play_arrow
• A) An erect, virtual and diminished image

B) An erect, real and diminished image

C) An erect, real and enlarged image

D) A virtual, erect and enlarged image

View Answer play_arrow
• A) Convex mirrors

B) Concave mirrors

C) Plane mirrors

D) Concave lens

View Answer play_arrow
• A) A reflecting, elliptical surface

B) A reflecting, spherical surface

C) A reflecting, parabolic surface

D) A flat, reflecting surface

View Answer play_arrow
• A) It cannot be captured on a screen.

B) It can be captured on a screen.

C) It can be captured only on a celluloid screen.

D) It is always magnified.

View Answer play_arrow
• A) Convex lens

B) Pinhole camera

C) Concave mirror

D) Convex mirror

View Answer play_arrow
• A) The right of the object will be on the right side of the image.

B) The left side of the object will be on the left side of the image.

C) The upper part of the object will be at the bottom of the object.

D) The right side of the object will be on the left side of the image.

View Answer play_arrow
• A) Concave

B) Plane

C) Convex

D) All of the above

View Answer play_arrow
• A) They reflect light better than othel mirrors.

B) They produce images which are clearer than those produced by others

C) They produce magnified images.

D) They give a wide field of view.

View Answer play_arrow
• A) Light travels in straight lines.

B) Images are always inverted.

C) Image gets inverted when the light travels through a hole.

D) There is no specific reason.

View Answer play_arrow
• A) 6.4 m

B) 6.8 m

C) 6 m

D) 5.2 m

View Answer play_arrow
• A) The image lies between the pole and focus.

B) The image is diminished in size.

C) The image is erect.

D) The image is real.

View Answer play_arrow
• A)

B)

C)

D)

View Answer play_arrow
• A) White light is a mixture of seven colours.

B) The different colours of light is reflected at different angles in a glass prism.

C) The prism adds colour to the white sunlight.

D) Light travels at high speed.

View Answer play_arrow
• A) Plane mirror

B) Convex mirror

C) Concave mirror

D) Concave lens

View Answer play_arrow
• A) Plane mirror

B) Convex lens

C) Concave lens

D) Convex mirror

View Answer play_arrow
• A) 4

B) 8

C) 9

D) 11

View Answer play_arrow
•  Column I Column II a. Plane mirror 1. Used as a magnifying glass b. Convex mirror 2. Can form images of objects spread over a large area c. Convex lens 3. Used by dentists to see enlarged images of teeth d. Concave mirror 4. 1 mage is erect and of the same size as the object e. Concave lens 5. The image is erect and smaller than the object

A) a-4, b-5, c-3, d-1, e-2

B) a-4, b-5, c-1, d-3, e-2

C) a-4, b-3, c-2, d-5, e-1

D) a-4, b-1, c-3, d-2, e-5

View Answer play_arrow
• A) $30{}^\circ$

B) $45{}^\circ$

C) $60{}^\circ$

D) The reflected ray from mirror ?2? will be parallel to the surface of mirror '3'

View Answer play_arrow
• A) S

B) T

C) L

D) P

View Answer play_arrow

You need to login to perform this action.
You will be redirected in 3 sec