Light

Question 1

Light

Answer 1

Is a form of energy. It can do work or cause movement

Question 2

Other forms of light energy

Answer 2

• solar cell (light > electrical)
• solar panels (light > heat)
• green plant (light > chemical energy)

Question 3

Why are shadows formed

Answer 3

Light travels in straight lines. Light cannot pass through certain materials

Question 4

Eclipse

Answer 4

Occurs when the moon passes between the sun and the earth

Question 5

Dispersion of light

Answer 5

Is the breaking up of white light into 7 colours

Question 6

Name the colours you NEED to know for this chapter

Answer 6

Red
Orange
Yellow
Green
Blue 
Indigo
Violet

Question 7

Reflection

Answer 7

Is the bouncing of light of a surface. Light is reflected in many directions

Question 8

Mirror image

Answer 8

When you see an image in a plane mirror it is laterally inverted. This means the left side is on the right and the right side is on the left.

Question 9

Periscopes

Answer 9

Allow us the see over thing. The miss or must always be at a 45* angle or else it won’t reflect.

Question 10

Refraction

Answer 10

Is the bending of light as it passes from once medium to another.

Question 11

Applications of refracting

Answer 11

Lenses
Microscopes
Telescopes

Question 12

What is the sentence for dispersion of light?

Answer 12

Richard Of York Gave Battle In Vein

Question 13

Luminous objects

Answer 13

Make their own light

Question 14

Eg of luminous objects

Answer 14

The sun

Electric light bulb when switched on

Question 15

Diverging lens

Answer 15

The light spreads outwards

Question 16

Congering lens

Answer 16

The light goes in (opposite to diverging lens)

Question 17

Name two uses of light energy

Answer 17

Photosynthesis and light energy

Question 18

Is the moon luminous or non luminous and why?

Answer 18

Non luminous because its reflects the light from the sun

Question 19

Lenses

Answer 19

One of the main applications for refraction