Question

The symbol used to denote the speed of light in a vacuum is _____. c l n v

All objects in the universe radiate some form of energy.
a. True
b. False

Answer 1

The answer would be

A. (Which is C)

Answer 2

-- In writing about Physics or doing Physics homework, you're free
to use any symbol you want to stand for anything you want, but you
MUST make it clear what any symbol you use stands for. The vast
majority of scientists and other writers use 'c' for the speed of light,
but there's no law.

-- Yes. Oh yes, yes ! All objects in the universe radiate some form of energy.