A photon of blue light has a frequency of 8.00 × 10¹⁴ Hz. Calculate the wavelength of this photon (c = 3.00 × 10⁸ m/s) in nanometers.

What is the wavelength of light emitted when the electron in a hydrogen atom undergoes a transition from level   n= 6  to   n= 1? What is the wavelength of light emitted when the electron in a hydrogen atom undergoes a transition from level   n= 6  to   n= 1?  (c=3.00×108  m/s,  h=6.63×10−34  J⋅s,  RH=2.179×10−18 J)(c=3.00×108  m/s,  h=6.63×10−34  J·s,  RH=2.179×10−18 J) Select one: a. 144.8 nm b. 982 nm c. 93.7 nm d. 239 nm

An electron in a hydrogen atom jumps from n=7 to n = 5 and emits a photon. What is the wavelength of the emitted light in the unit of nanometer?   R=1.097×107 m-1.

A laser pointer used in the classroom emits light at 4950 Å, at a power of 4.00 mW. (One watt is the SI unit of power, the measure of energy per unit of time. 1 W = 1 J/s). How many photons are emitted from the pointer in 115 seconds?