The table gives data for two telescopes observing the same visible wavelength.
| Telescope | Mirror area | Fraction of incoming radiation transmitted to the mirror |
|---|---|---|
| P, on the ground | 12 m2 | 0.40 |
| Q, in space | 5.0 m2 | 1.00 |
The rate of light collection is proportional to mirror area multiplied by the transmitted fraction. The detectors are identical. Which statement correctly compares the rate of light collection and the effect of atmospheric turbulence?
P collects slightly more light; only P avoids atmospheric turbulence.
P collects slightly more light; only Q avoids atmospheric turbulence.
Q collects slightly more light; only P avoids atmospheric turbulence.
Q collects slightly more light; only Q avoids atmospheric turbulence.
75 exam-style questions on Edexcel GCSE Physics 7.3 Stars, covering 7.3.1 Evolution of stars similar to the Sun, 7.3.2 Evolution of massive stars, and 7.3.3 Observing the Universe. Each one has a worked solution and a mark scheme showing where the marks go.