Question

Which of the following can be used to find the focal length of a convex lens? a) Object at a distance of 10 cm for a lens of focal length 30 cm
b) Light from a laboratory window
c) Light from the sun
d) Light from a tree next to the window

Answer 1

Answer:

Which of the following can be used to find the focal length of a convex lens? a) Object at a distance of 10 cm for a lens of focal length 30 cm

d) Light from a tree next to the window

Answer 2

Answer:

Light from the sun..

hope it helps