If n photons are emitted per second then power of the laser is
E is the energy of each photon
Each photon has a wavelength given by
So, energy of each photon is
h is the Planck's constant and c is the velocity of light
Putting the values
So, power of the laser is
Diameter of the beam is 2 mm
So, radius of the beam is
So, intensity o the laser beam is
a) We know average intensity corresponding to an electromagnetic wave of peak electric field is given by
is the permittivity of free space
Putting the values,
This is the peak electric field.
b) If corresponding to the above electric field E we have a peak magnetic filed B then we must have from the property of EM wave that
1. (3 points) Consider a beam of light of wavelength 514.5 nm emitted by a laser....
In a ruby laser, laser light of wavelength 694.3 nm is emitted. The ruby crystal is 7.80 cm long, and the index of refraction of ruby is 1.75. Think of the light in the ruby crystal as a standing wave along the length of the crystal. How many wavelengths fit in the crystal? (Standing waves in the crystal help to reduce the range of wavelengths in the beam.) wavelengths
a) A laser produces a beam of light whose average power is 4W. How much energy is stored in a 3m length of the beam? Use c=3*10^8 b) If the area of the beam in part a) is .001m^2, what is the average intensity of the beam? c) If unpolarized light had an average intensity equal to that found in part b), and it were passed first through a polarizer, then through an analyzer whose axis of transmission is tilted...
A particular green laser pointer emits light with a wavelength of 532 nm , and it is advertised as having a power of 6 mW . 1. What is the energy of a single photon in this laser beam? 2.How many photons are emitted by this laser in 1 second?
A particular green laser pointer emits light with a wavelength of 532 nm , and it is advertised as having a power of 3 mW . Part A: What is the energy of a single photon in this laser beam? Part B: How many photons are emitted by this laser in 1 second?
Find the intensity of the electromagnetic wave described in each case (a) an electromagnetic wave with a wavelength of 595 nm and a peak electric field magnitude of 8.3 V/m W/m2 (b) an electromagnetic wave with an angular frequency of 5.5 x 1018 rad/s and a peak magnetic field magnitude of 10-10 T. W/m2
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 2.0 mW. How many photons are emitted per second by this laser? ________ photons/s
wavelength of 1.06 um is 1 mrad. Determine the 3.1-6 Beam Parameters. The light emitted from a Nd:YAG laser at a a Gaussian beam of 1-W optical power and beam divergence 20o beam waist radius, the depth of focus, the maximum intensity, and the intensity on the beam axis at a distance z = 100 cm from the beam waist wsadhe A Gaussian beam of wavelength Ao 10.6 um wavelength of 1.06 um is 1 mrad. Determine the 3.1-6 Beam...
2. HeNe LASER: ENERGY IN ELECTROMAGNETIC WAVES: (problem 24-32): PART A: Assume the helium-neon lasers commonly used in student physics laboratories have power out- puts of 0.450 mW. If such a laser beam is projected onto a circular spot 1.00 mm in diameter, what is its intensity? PART B: Find the peak electric field strength. PART C: Find the peak magnetic field strength.
A beam of laser light with a wavelength of 1 = 560.00 nm passes through a circular aperture of diameter a = 0.189 mm. What is the angular width of the central diffraction maximum formed on a screen? A=
A 5.20 mW helium neon laser emits a visible laser beam with a wavelength of 633 nm. how many photons are emitted per second? Express your answer as a number of photons per second.