magnification and power

Question 1

how is the focal length related to the power of the lens?

Answer 1

the more powerful the lens, the more strongly it converges and the shorter the focal length

Question 2

what is a converging lens?

Answer 2

positive

Question 3

what is a diverging lens?

Answer 3

negative

Question 4

what is the focal length determined by?

Answer 4

• the refractive index

- the curvature of 2 surfaces of lens

Question 5

what happens if the lens is powerful?

Answer 5

the more strongly curved it’s surfaces

Question 6

what happens if there is a greater refractive index?

Answer 6

the flatter the lens

Question 7

how can u make powerful lenses thinner?

Answer 7

using materials with a high refractive index

Question 8

how can u create a magnified virtual image?

Answer 8

the object must be closer to lens that the focal length

Question 9

how are the light rays affected?

Answer 9

they don’t come from places they appear to be and so they can’t project a virtual image onto a screen