Of the possible statements that parallel rays are brought to a ...

[NClaborn]

Of the possible statements that parallel rays are brought to a focus by a 1) concave mirror, 2) convex mirror, 3) converging lens, 4) diverging lens, the correct answer is
 a. 1 and 2.
  b. 3 and 4.
  c. 1 and 3.
  d. 2 and 3.
  e. 2 and 4.

Question 2

If a convex lens were made out of very thin clear plastic filled with air, and were then placed underwater where n = 1.33 and where the lens would have an effective index of refraction n = 1, the lens would act in the same way
 a. as a concave mirror in air.
  b. as a concave lens in air.
  c. as a convex lens in air.
  d. as a flat refracting surface between water and air as seen from the water side. e. as the glasses worn by a farsighted person.

[stano32]

Answer to Question 1

C

Answer to Question 2

B

[NClaborn]

Thank you!

[stano32]

Always glad to help...