Light

Question 1

Light

Answer 1

Is a form of energy

Question 2

Light travels

Answer 2

In straight lines

Question 3

Luminous objects

Answer 3

Make and give out their own light

Question 4

Non luminous objects

Answer 4

Reflect light from other objects, do not make their own light

Question 5

Dispersion

Answer 5

Separating of light into into its different colours

Question 6

Constituent colours

Answer 6

Different colours that make up white light

Question 7

Refraction

Answer 7

Bending of light as it passes from one medium to another

Question 8

Speed of light

Answer 8

Much faster than sound 3x10(8 squared) m/s

Question 9

Shadows

Answer 9

Made because light travels in straight lines and it cannot pass through some materials

Question 10

Eclipse

Answer 10

When the sun is blocked by the moon it is called a solar eclipse, when the moon is blocked by the shadow from the earth it is a lunar eclipse

Question 11

Rainbow

Answer 11

Red, orange, yellow, green, blue, indigo, violet

Question 12

Periscope

Answer 12

Two plane mirrors are placed at 45 degree angles to see over obstacles

Question 13

Converging lens

Answer 13

Makes light rays come together, fixes long sightedness

Question 14

Diverging lens

Answer 14

Makes light rays move out from each other, fixes short sightedness

Question 15

White light in a prism

Answer 15

Red is least refracted and violet is most refracted

Question 16

Periscope

Answer 16

Is made using two plain mirrors at 45 degree angles to each other

Question 17

Refraction

Answer 17

The bending of light as it goes from one medium to another e.g. air to water

Question 18

Convex

Answer 18

Is converging

Question 19

Concave

Answer 19

Is diverging