The orbit of each planet about the Sun is an ellipse with the Sun at one focus. According to the universal law of gravitation, the force due to gravity is directly proportional to the square of the distance between objects. According to the universal law of gravitation, if you double the masses of both attracting objects, then the gravitational force between them will not change at all. All of the above. The wavelength of a wave is the distance between where the wave is emitted and where it is absorbed.
Longer wavelength means higher frequency and lower energy.
Longer wavelength means lower frequency and higher energy. Longer wavelength means higher frequency and higher energy. Longer wavelength means lower frequency and lower energy. There is no simple relationship because different photons travel at different speeds. X rays have higher energy than radio waves.