Lens

Question 1

what is a lens

Answer 1

a lens is a curved piece of transparent material that makes use of refraction to control the direction of light

Question 2

what are the two types of lens

Answer 2

convex and concave

Question 3

how would you describe a convex lens

Answer 3

is thicker in the centre and becomes thinner towards the edges

Question 4

how would you describe a concave lens

Answer 4

is thin in the centre and thicker towards the edges

Question 5

what is a converging lens

Answer 5

is when a convex lens makes parallel light rays that pass through and get closer together

Question 6

what is a focal point

Answer 6

the point at which the rays meet

Question 7

what is a focal length

Answer 7

distance from the focus to the centre of the lens

Question 8

what is a principle axis

Answer 8

line passing through the optical centre of the lens

Question 9

what is a diverging lens

Answer 9

is when a concave lens makes parallel light rays that pass through and spread out

Question 10

what is a real image

Answer 10

an image that can be projected on a screen

Question 11

what is a virtual image

Answer 11

is an image that can only been seen by your eyes

Question 12

what is a inverted image

Answer 12

is when the image is upside down

Question 13

what is a upright image

Answer 13

when the image is the right way up

Question 14

what is a enlarged image

Answer 14

when the image is larger than the object

Question 15

what is a diminished image

Answer 15

when the image is smaller than the object