Light and Formation of Shadows

Light travels in ___

• (a) straight line

• (b) curved line

• (c) zig-zag line

• (d) randomly

When an opaque object comes in the path of light it forms ___

• (a) an image with colours

• (b) shadow

• (c) black and white image

• (d) depends on the colour of the light

Which types of objects do not allow light to pass through them?

• (a) Translucent

• (b) Opaque

• (c) Transparent

• (d) Penumbra

Which is an example of a translucent object?

• a) A thin sheet of paper

• (b) A thin glass slab

• (c) A thin iron sheet

• (d) All of these

Bouncing back of light from shining surfaces is called____

• (a) Reflection

• (b) Refraction

• (c) Bending

• (d) Dispersion

Out of these, which one is not a man-made luminous body?

• (a) Electric bulb

• (b) Burning candle

• (c) Firefly (Jugnu)

• (d) Oil lamp

Image formed by a pinhole camera is ……………….. .

• (a) upside down

• (b) random image

• (c) broken image

• (d) none of these

……………… objects cast no shadow.

• Opaque

• Transparent

• Translucent

• All of these

The material through which light does not pass is said to be ___

• Plain

• Translucent

• Transparent

• Opaque

Opaque objects cast …………………. shadows in morning and evening while ………………… shadows at noon.

• Short, medium

• Short, Long

• Long, Short

• None