What is the energy of a single photon of microwave radiation with a wavelength of 0.0618 meters? Your answer should have 3 sig figs.

An electron moves in a two-dimensional rectangular box with the dimensions, Lx= 5.00 Å and Ly =3.00 Å. Calculate the energy of the absorbed photon in cm"l when it makes a transition from the ground state to the 1st excited state.

Answer the following questions about a Blu-ray laser:(a) The laser on a Blu-ray player has a wavelength of 405 nm. In what region of the electromagnetic spectrum is this radiation? What is its frequency? (b) A Blu-ray laser has a power of 5 milliwatts (1 watt = 1 J s−1). How many photons of light are produced by the laser in 1 hour? (c) The ideal resolution of a player using a laser (such as a Blu-ray player), which determines how close together data can be stored on a compact disk, is determined using the following formula: Resolution = 0.60(λ/NA), where λis the wavelength of the laser and NA is the numerical aperture. Numerical aperture is a measure of the size of the spot of light on the disk; the larger the NA, the smaller the spot. In a typical Blu-ray system, NA = 0.95. If the 405-nm laser is used in a Blu-ray player, what is the closest that information can be stored on a Blu-ray disk? (d) The data density of a Blu-ray disk using a 405-nm laser is 1.5 × 107 bits mm−2. Disks have…

how many photons are there in a 7.00 mJ laser beam of wavelength 785 nm?