P14 (Light)

Question 1

Convex Lens

Answer 1

• bulges outwards

- rays of light comes together

Question 2

Concave Lens

Answer 2

• caves inwards

- rays spread out

Question 3

3 rules for refraction in a Convex Lens

Answer 3

1) incident ray parallel to the axis refracts through lens and passes
to principle focus on other side
2) Incident ray through principle focus travels through lens parallel to the axis
3) An incident ray passing through the centre carries on in the same direction

Question 4

3 rules for refraction in a Concave Lens

Answer 4

1) Incident ray parallel to the axis refracts through lens and travels in line with the principle focus
2) Incident ray passing through lens towards principle focus refracts through lens parallel to the axis
3) An incident ray through the centre carries on in the same direction

Question 5

Real Image

Answer 5

When light comes together to form an image on the screen

Question 6

Virtual Image

Answer 6

• When the rays diverge so the light appears to come from a different place
• virtual image

Question 7

3 things to say when describing an image

Answer 7

1) how big compared to the object
2) Wether it is upright of inverted compared to the relative objecg
3) real or virtual

Question 8

Magnifying Glasses

Answer 8

• magnified virtual image

- meaning light rays don’t come from place where they appear to be