Light and Shadows

What is always needed to have a shadow?

• a light source

• the sun

• a candle

• fire

What is always needed to have a shadow?

• an object to block the light source

• a rock

• a hand

• a wall

Light is made of...

• photons

• gravity

• forces

• fire

Light can move as...

• particles

• inertia

• reaction

• a car

Light can move as...

• a wave

• mass

• ds/dt

• a plane

Transparent objects...

• let all the light go through them

• Don't let any light go through them

• Let some of the light go through them

Opaque objects...

• let all the light go through them

• Don't let any light go through them

• Let some of the light go through them

Translucent objects...

• let all the light go through them

• Don't let any light go through them

• Let some of the light go through them

If a shadow is big...

• the object is close to the light source

• the object is far from the light source

• there is no light source

If a shadow is small...

• the object is close to the light source

• the object is far from the light source

• there is no light source