When a distant star explodes, a visible light telescope and a radio telescope located on Earth receive signals from the exploding star at the same time.

Question

Which feature of the electromagnetic theory does this evidence support?

Answer options with 4 options
A.
Visible light waves are more energetic than radio waves.

B.
Radio wavelengths are longer than visible light wavelengths.

C.
Electromagnetic radiation can have a wide range of frequencies.

D.
The speed of electromagnetic waves is independent of wavelength.

Answer 1

The correct answer is:

D. The speed of electromagnetic waves is independent of wavelength.

This statement supports the observation that both the visible light and radio signals from the exploding star arrive at the same time on Earth, demonstrating that all electromagnetic waves, regardless of their wavelength, travel at the same speed in a vacuum.