Hi -

I've answered the question below but am unsure of it's correctness - can you provide advice please ?

Many Thanks,

A

Write down a formula that relates the wavelength and frequency for a light wave travelling in a vacuum.

Use your formula to determine the wavelength that corresponds to the frequency 1400 THz.

Show all your working, and take care to use units consistently throughout, remembering that 1 Hz = 1 s^-1.

If required, take the speed of light in a vacuum to be c = 3.0 10⁸ m s^-1

Calculate the photon energy that corresponds to the frequency 1400 THz.

You should assume Planck's constant h = 6.63 10³⁴ J s, use units consistently throughout, and give your final answer to an appropriate number of significant figures