5th Grade The way we see things

The thing which give off light are called light source.

• true

• false

Light is form of ....

• fire

• energy

• force

• air

A bundle of light rays makes up ....

• light ray

• light dimension

• beam of light

• light generators

 

What is the correct order of what happens when our eyes see the flower in the picture:

1. the light bounces off

2. the light enters the boy's eyes

3. the sunlight hits the flowers

• 1-2-3

• 3-1-2

• 2-1-3

• none

 

This graph shows how the light intensity changes as the distance from the light source increases.

What is the light intensity at 30 cm from the light source?

• 2000 lux

• 1500 lux

• 550 lux

• 4500 lux

Which of these are examples of man-made sources of light?

• lightning

• sun

• campfire

• stars

Light always travels in a ... line.

• straight

• square

• curved

• elliptical

The intensity of the light can be measured using a .....

• intenisty

• stopwacth

• volt meter

• light meter

The unit of light intensity is called ...

• gram

• volt

• lux

• meter

Based on this graph, the light intensity at 10 cm from the light source is ... lux.

• 1500

• 2500

• 2000

• 500