A spacecraft orbiting the Moon passes behind the lunar disk (an occultation) as observed by a telescope in space. The spacecraft transmits signals in the radio, visible, and X-ray regions of the electromagnetic spectrum.
Which statement is correct as the spacecraft disappears behind the Moon?
Radio signals from the spacecraft disappear before the visible light and X-rays.
X-rays from the spacecraft disappear before the radio signals and visible light.
Visible light from the spacecraft disappears before the radio signals and X-rays.
Radio signals, X-rays, and visible light from the spacecraft all disappear at the same moment.
198 exam-style questions on CIE IGCSE Physics Electromagnetic spectrum, covering Electromagnetic spectrum. Each one has a worked solution and a mark scheme showing where the marks go.