Four hypothetical planets orbit the Sun with the semi-major axes listed below

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Four hypothetical planets orbit the Sun with the semi-major axes listed below. P:

0.50\,\text{AU}

1.0\,\text{AU}

1.5\,\text{AU}

2.0\,\text{AU}

Which planet will take the longest time to complete one revolution? (a) P (b) R (c) S (d) Q