factors affecting the size of shadow

Fill in the missing words with the correct answer.

Light travels in ___________ lines from a ___________ of light that bounces off an object.

• curve, source

• straight, source

Fill in the missing words with the correct answer.

Cardboard or metal are _____________ materials that light cannot pass through.

• transparent

• translucent

• opaque

Fill in the missing words with the correct answer.

_________ is a ___________ material which allows all light to pass through.

• Tissue paper, translucent

• Glass, transparent

• Tin foil, opaque

Fill in the missing words with the correct answer.

Tissue paper is ________________ material which let some light to pass through.

• translucent

• transparent

• opaque

Fill in the missing words with the correct answer.

When an object lock out the_______, a ___________ is formed.

• light, shadow

• shadow, light

• stone, light

Refer to the above diagram, which statement is correct?

• The closer the object and the screen, the bigger the shadow.

• The closer the object and the screen, the smaller the shadow.

• The closer the object and the screen, no changes on the shadow.

What is the nature of light that causes the formation of shadows above?

• The light moves straight

• Light can be refined

• Light can be reflected

• The light can be bent

The further the doll (object) to the wall (screen), the ___________ the shadow size.

• smaller

• bigger

The nearer the doll (object) to the wall (screen), the __________ the size of the object.

• smaller

• bigger

The factors that effecting the size of the shadows are ..... (2 answers)

• the position of light source

• the distance between the light source and object

• the distance between the object and the screen

• the orientation of the object