Which of the following is not evidence of convex and/or concave lens is being used to perform a task?

a. examining a skin cell in detail with a microscope.

b. watching snowfall through your living room window

c. being able to read a faraway sign through new contacts.

d. watching for nearby cars getting too close in your side view mirrors

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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explanation:

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lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

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