Test on light prim.5

The ............ is the light energy that can be seen.

• visible spectrum

• regular reflection

• shadow

• transparent material

The main source of light on the Earth's surface is ............

• the Sun.

• the Moon

• stars.

• the candle.

Light transmits in ............ lines.

• curved

• broken

• straight

• zigzag

Formation of images through narrow holes is due to .......

• traveling light in straight lines,

• light reflection,

• light refraction.

• separation of light.

When light falls on an opaque body, ............ is formed.

• no image

• white light

• a shadow

• an inverted image

Light travels in straight lines. This idea is used in operating ............

• camera.

• electric heater.

• electric iron.

• radio.

The nearer object to the light source has the ............ shadow.

• bigger

• smaller

• fainted

• all the previous answers

All the following are examples of transparent materials except ............

• air.

• tissue paper

• glass.

• clear water.

Light can be easily transmitted through ............... materials.

• a. transparent

• b. semi-transparent

• c. opaque

• d. (a) and (b)

We can see objects due to ............ of light on them.

• a. reflection

• b. refraction

• c. shadow

• d. spectrum colors