Identify the correct statements among the following:
(A) An electromagnetic wave travels in vacuum like sound waves.
(B) An ultraviolet wave is not an electromagnetic wave.
(C) An electromagnetic wave can travel from earth to the planet, saturn.
(D) An electromagnetic wave may have less velocity in a medium than in vacuum.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (C) and (D) only
(A) Incorrect — Sound needs a medium, while electromagnetic waves can travel in vacuum.
(B) Incorrect — Ultraviolet is a part of the electromagnetic spectrum.
(C) Correct — Electromagnetic waves can propagate through the vacuum of space, so they can travel from Earth to Saturn.
(D) Correct — The velocity of electromagnetic waves decreases in a medium compared to vacuum.
Final Answer: (C), (D)