Card 1 of 24
What does it mean that the Universe is expanding?
A
Compressed waves have a shorter wavelength and higher observed frequency.
B
Wavelength and frequency vary inversely because wave speed is constant and v=fλ\boxed{v = f\lambda}v=fλ.
C
Absorption lines are shifted to longer wavelengths than laboratory lines.
D
Distances between distant galaxies are increasing.
Card 1 of 24
7.2 The Universe and red-shift Flashcards
24 flashcards on Edexcel GCSE Physics 7.2 The Universe and red-shift: the key terms, definitions and equations you need to recall for Paper 1 and Paper 2.