Light Light

(1)

Light

(2)

(3)

• Objects that create light are “sources” of light or “luminous sources”.

• Name 2 luminous sources

• We can see non-luminous objects because light bounces off them and enters our

eyes.

• Name 2 non-luminous sources

(4)

(5)

Laser

(6)

This would be the

same speed as a plane going around the

world 8 times in one second.

(7)

Light travels much faster than sound. For example:

1) Thunder and lightning start at the same time, but we will see the

lightning first.

2) When a starting pistol is fired we see the

smoke first and then hear the bang.

(8)

Homework

(9)

Shadows are places where light is “blocked”:

Rays of light

(10)

1) Light travels in ________ ______.

2) Light travels much _______ than sound.

3) We see things because they ______ light into our eyes.

4) ________ are formed when light is blocked by an object.

Shadows faster straight lines reflect

(11)

Speed km/sec Light

Sound

A car on a motorway A person walking