Physics Quiz- Chapter 13

Question 1

Converging lens

Answer 1

A lens that is thickest in the middle and that causes incident parallel light rays to converge through a single point after refraction

Question 2

Diverging lens

Answer 2

A lens that is thinnest in the middle and that causes incident parallel light rays to spread apart after refraction

Question 3

F

Answer 3

(Principal focus) the point on the principal axis of a lens where light rays parallel to the principal axis converge and for converging lens after refraction

Question 4

F’

Answer 4

(Secondary principal focus) for converging the focus that is on the same side of the lens relative to the incident rays and for diverging it is on the opposite side

Question 5

2F

Answer 5

(

Question 6

2F’

Answer 6

(

Question 7

f

Answer 7

(Focal length) distance from the optical centre to the principal focus F

Question 8

O

Answer 8

(Optical centre) point at the exact centre of the lens

Question 9

Positive meniscus

Answer 9

A modified form of the converging lens shape

Question 10

Negative meniscus

Answer 10

A modified form of the diverging lens shape

Question 11

Eye accommodation

Answer 11

Eye muscles change the shape of the eye lense to allow a sharply focused image to form on the retina.