Which is a non luminous body?

• moon

• STAR

• SUN

• All of these

In a pinhole camera, the image formed is

• erect

• inverted

• smaller

• larger

black is thick paper is what object?

• Transparent

• Translucent

• opaque

• None of these

luminous objects

• Emit light during night time

• Emit light during day time

• Emit light of their own during day and night

• None of the above

Who measured the speed of light first?

• Galileo

• Newton

• Romer

• Einstein

I have kept an object in my hand and through it tried to look at a lighted torchheld against it. nothing except a faint glow is visible. the object in my hand is?

• Transparent

• Translucent

• Opaque

• None of the above

Light travels in a zig zag line.

• True

• False

• Not be determined

A shining star is

• A natural source of light

• An artificial source of light

• A luminous body

• Both a and c

Image formed in water is

• erect

• inverted

• larger

• None of these

How long to the nearest minute does it take for light from the sun to reach the earth?

• 7 minutes

• 8.3 minutes

• 8 minutes

• 7.9 minute