Please help me answer this question

Question

Calculate the wavelength for an x-ray photon with a frequency of 3.0 x 1019 Hz. Don't forget to include the correct unit. Hint: The speed of light is 3.0 x 108 m/s.

Answer 1

speed of light (c) = wavelength (λ) times frequency (𝛎) or c = λν

3.0x10⁸ m/s = λ(3.0x10¹⁹/s)

λ = 3.0x10⁸ m/s /3.0x10¹⁹s^-1

λ = 1.0x10^-11m