Verified answer

Answer:

A shadow is a dark patch which is formed when an opaque or a translucent object comes before the source of light.

Explanation:

Condition required for a shadow formation.

Source of light

There must be a source of light for shadow formation which may be artificial like torch or natural like sun

Object

There must be an object to block the path of the light to form a shadow.

The object should be opaque or translucent as transparent object will not form shadow because it allows light to pass through them completely. Opaque objects form dark shadows and translucent objects form taint shadows.

Surface or screen

There should be a surface or a screen where the shadow could be formed. It is important to note that the screen or surface should be opaque.

Distance from the source of light.

The distance between the source of light and the object effects in the size of the shadow. If the source of the light is far away the shadow formed will be shorter.

If the source of light is closer to the object then shadow formed will be larger.

Opaque objects are objects that don't allow any light to pass through it. Ex wood

Translucent object allows light to pass through it partially. Ex tainted glass

Transparent object allows light to pass through it completely. Ex clear water and glass.

These are some points you must remember regarding light and shadow.

I hope this helps you.

Thank you.

Answer:

a.early morning time, evening time.

b.afternoon time

Explanation:

a. Early morning time is sunrise time so we see shadow is bigger than object., Evening time is sunset time this time day into night.

b. Afternoon time is sun is center in sky so we see down means