Calculate the wavelength of a photon that has three times as much energy as that of a photon of wavelength 779 nm? (A) 460 nm (В) 360 nm (C) 260 nm (D) 560 nm

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…

What are the wavelength ranges for the following (assume 3 sigs.): (a) the AM radio band (540-1600 kHz) (b) the FM radio band (88.0-108 MHz)

In fireworks displays, light of a given wavelength indicatesthe presence of a particular element. What are the frequency and color of the light associated with each of the following?(a) Li⁺, λ=671 nm(b) Cs⁺, λ=456 nm(c) Ca²⁺,λ= 649 nm(d) Na²⁺, λ=589 nm

Which of the following quantum transitions of an electron in a hydrogen atom would emit a photon with the shortest wavelength?  Group of answer choices (a) : n = 1 to n = 4 (b) : n = 4 to n = 2 (c) : n= 4 to n = 3 (d) : n = 4 to n = 1 (e)    n = 2 to n = 4

Photons of a certain ultraviolet light have an energy of 6.21  10-19 J. (a) What is the frequency of this UV light? Hz(b) Use ? = c/f to calculate its wavelength in nanometers (nm). nm