An astronomical observation detects light from a distant galaxy. Due to cosmological redshift, the radiation has shifted from the ultraviolet region of the electromagnetic spectrum to the visible red region.
How does this shift affect the wavelength and speed of the radiation in a vacuum?
Wavelength: decreased; Speed: decreased
Wavelength: increased; Speed: stayed the same
Wavelength: increased; Speed: decreased
Wavelength: decreased; Speed: stayed the same
59 exam-style questions on CIE IGCSE Physics 6.2.3a Galaxies and the scale of the Universe. Each one has a worked solution and a mark scheme showing where the marks go.