1. What is the wavelength (in meters) of a radio wave with a frequency of 9.31 x Hz?

2. Calculate the energy of:
a) a photon with a wavelength of 5.00 x nm.
b) a photon with a wavelength of 5.00 x nm.

3. The energy of a photon is 5.87 x J. What is its wavelength in nm?

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.