What is the wavelength of a green light laser with the frequency of 5.555 x 1014 Hz? [speed of light is c = 3 × 108 m/s] ○ 555 nm 570 nm O540 nm 495 nm 167 nm ○ 185 nm
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- A green laser beam with a wavelength l = 532 nm has an energy of 3.85 x 10–3 J per pulse. What is the energy per photon? (h = 6.63 x 10–34J.s; c = 3.00 x 108 m/s; 1 nm = 10–9 m) (A) 3.85 x 10–3 J (B) 3.74 x 10–37 J (C) 3.74 x 10–28 J (D) 3.74 x 10–19 JAn argon-ion laser produces a cylindrical beam of light whose average power is 0.725 W. How much energy is contained in a 2.88-m length of the beam?A lightbulb emits light with a power of 100 W at a wavelength of 550 nm. You view the lightbulb from a distance of 1 km. The diameter of the pupil of your eye is 2 mm. How much light energy enters your eye in 1 second? 4.5 x 10-11 J 2.5 x 10-11 J 4.0 x 10-11 J O 3.5 x 10¬11 J O 3.0 x 10-11 J 2.0 x 10-11 J
- When light with a wavelength of 198 nm strikes the surface of tin metal. What is the photon energy from the wavelength? A 1.2 x 10-18 J в) 7.1х 10:19] 1.98 x 10-7J 1.0 x 10-18 JMany varieties of lasers emit light in the form of pulses rather than a steady beam. A tellurium–sapphire laser can produce light at a wavelength of 800 nm in ultrashort pulses that last only 4.00 x 10-15 s (4.00 femtoseconds, or 4.00 fs). The energy in a single pulse produced by one such laser is 2.00 µJ = 2.00 x 10-6 J, and the pulses propagate in the positive x-direction. Find (a) the frequency of the light; (b) the energy and minimum energy uncertainty of a single photon in the pulse; (c) the minimum frequency uncertainty of the light in the pulse; (d) the spatial length of the pulse, in meters and as a multiple of the wavelength; (e) the momentum and minimum momentum uncertainty of a single photon in the pulse; and (f) the approximate number of photons in the pulse(a) How many minutes does it take a photon to travel from the Sun to the Earth? 8.32 It can be useful to remember that light travels from the Sun to Earth in about 8.32 minutes. min (b) What is the energy in eV of a photon with a wavelength of 628 nm? 1.98 eV (c) What is the wavelength (in m) of a photon with an energy of 1.13 eV? 1.76*10**-6
- A certain photon of red light has a wavelength of 462 nm. What is the speed of this photon?A green laser emits a beam of wavelength 532 light nm in the air. The wavenumber k is : Select one : a) 1.880 x 106 rad m-1 b) 1.067 x 107 rad m-1 c)1.181 x 107 rad m-1 d) 6.701 x 107rad m-1(a) How many minutes does it take a photon to travel from the Sun to the Earth? 8.33 It can be useful to remember that light travels from the Sun to Earth in about 8.32 minutes. min (b) What is the energy in eV of a photon with a wavelength of 608 nm? 2.03 ev (c) What is the wavelength (in m) of a photon with an energy of 1.73 eV? 716 x m
- Scientists are working on a new technique to kill cancer cells by zapping them with ultrahigh-energy (in the range of 1.00×1012 W) pulses of light that last for an extremely short time (a few nanoseconds). These short pulses scramble the interior of a cell without causing it to explode, as long pulses would do. We can model a typical such cell as a disk 5.00 μm in diameter, with the pulse lasting for 4.00 ns with an average power of 2.00×1012 W. We shall assume that the energy is spread uniformly over the faces of 100 cells for each pulse. I 1.00×1021 W/m² Submit Previous Answers Part C Correct What is the maximum value of the electric field in the pulse? ΜΕ ΑΣΦ Emax Submit Request Answer Part D ? V/m What is the maximum value of the magnetic field in the pulse? ΜΕ ΑΣΦ Bmax = Submit Request Answer ? TA laser used in LASIK eye surgery produces 55 pulses per second. The wavelength is 220.0 nm (in air), and each pulse lasts 10.0 ps. The average power emitted by the laser is 120.0 mW and the beam diameter is 0.800 mm. How long (in centimeters) is a single pulse of the laser in air?Question 8