According to the third law of planetary motion, the period of revolution of a planet is related to the planet’s

Distance from the sun.

The third law of planetary motion states that the square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit. The semi-major axis is the distance from the sun to the epicenter of the ellipse (which would be the planet in question). So, the revolutionary period is directly related to the distance of the planet from the sun.

Wavelength divides in half and speed stays the same.