Question

Which of the following are properties of light?

• A. Light is a form of energy.
• B. Light travels in a straight line.
• C. Light can travel through vacuum.
• D. Light needs a medium to propagate.

Answer 1

Answer: (A), (B), (C)

The correct options are
A Light is a form of energy.
B Light travels in a straight line.
C Light can travel through vacuum.

The light rays from the Sun reach the earth. So, we can say that light can travel through the vacuum because the outer space is nothing but vacuum. We feel the heat from the rays of the sunlight. Thus, we can say that light is a form of energy. The formation of shadow by a source of light proves that light always travels in a straight line through a medium.