Two converging lenses, the first with focal length 40 cm and the second with foc

Question

Two converging lenses, the first with focal length 40 cm and the second with focal length 331/3 cm, are separated by 10.0 cm. An object of height 6.0 cm is placed 20.0 cm in front of the first lens. Where is the final image formed?

A.331/3 cm after the second lens

B.10 cm before the first lens

C.50 cm after the second lens

D.50 cm before the first lens

E.100 cm after the second lens

Huygens' Principle applies to

A.electromagnetic waves.

B.water waves.

C.sound waves.

D.all of these choices are correct

A nearsighted person wears contact lenses of refractive power -6.0 D. What is her far point?

17 cm

-4.0 cm

-17 cm

-6.0 cm

6.0 cm

Explanation / Answer

as per chegg guidelines i can answer only one.Please raise different question for others

last)

f = 100 / p

f = 100 / -6

= -16.7cm

far point distance = -f = -(-16.7) = 16.7 cm

so 17 cm

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