Question

Optical telescopes are used to study wavelengths from a certain portion of the electromagnetic spectrum. Which is true of optical telescopes?

A.
Optical telescopes are no longer in use.
B.
Optical telescopes do not study waves from the electromagnetic spectrum.
C.
Optical telescopes are used to study visible light from objects in space.
D.
Optical telescopes do not concentrate radiation.

Answer 1

Optical telescopes are used to study visible light from objects in space

Answer 2

C. Optical telescopes are used to study visible light from objects in space.