If a convex lens were made out of very thin clear plastic filled with air, and w

Question

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 the glasses worn by a farsighted person. b. as a concave mirror in air. c as a flat refracting surface between water and air as seen from the water side. d. as a convex lens in air. e. as a concave lens in air. You can raise the temperature of an object with. a. microwaves. b. infrared waves. c. ultraviolet rays. d. all of the above. e. only (a) and (b) above. Magnetic fields are produced by a. constant electric currents. b. electric currents that vary sinusoidally with time. c. time-varying electric fields. d. all of the above. e only (a) and (b) above.

Explanation / Answer

3. b. as a concave lens in air

4. d . all of the above

5. d. all of the above(accelerating charges produces magnetic field)

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