DP Physics (last assessment 2024)

Question 18N.2.SL.TZ0.6a

[Maximum mark: 2]

18N.2.SL.TZ0.6a

The ratio $\frac{{{\text{distance of Mars from the Sun}}}}{{{\text{distance of Earth from the Sun}}}}$ = 1.5.

(a)

Show that the intensity of solar radiation at the orbit of Mars is about 600 W m^–2.

[2]

Markscheme

use of $I \propto \frac{1}{{{r^2}}}$ «1.36 × 10³ × $\frac{1}{{{{1.5}^2}}}$ » ✔

604 «W m^–2» ✔

Syllabus sections