Physics Lenses

Question 0

Convex lens

Answer 0

Converging lens
1/u + 1/v = 1/f
Eg
Magnifying glass,

Question 1

Concave lens

Answer 1

Diverging lens
1/u - 1/v = -1/f
Eg
Door peepholes

Question 2

Power of kens

Answer 2

Its ability to converge/ diverge rays
P = 1/f 
Untit - m(-1)
Shorter focal length = more power
P= p1 + p2 (NOT for f)

Question 3

Long sighted

Answer 3

Can see far but can’t see near things
Converging/convex lens
(+)

Question 4

Short sighted

Answer 4

Can see near but can’t see distant
Diverging/ concave kens
(-)