An instructor wishes to determine the wavelength of the light in a laser beam. To do so, she directs the beam toward a partition with two tiny slits separated by 0.185 mm. An interference pattern appears on a screen that lies 4.80 m from the slit pair. The Instructor's measurements show that two adjacent bright interference fringes lie 1.59 cm apart on the screen. What is the laser's wavelength (in nm)?
A beam of light from a monochromatic laser shines into a piece of glass. The glass has thickness L and index of refraction n=1.5 . The wavelength of the laser light in vacuum is L/10 and its frequency is f In this problem, neither the constant c nor its numerical value should appear in any of your answers. (1)How long does it take for a short pulse of light to travel from one end of the glass to the other?
A monochromatic, unpolarized beam of laser light is incident on
a polarizer that is aligned along the vertical direction. The light
has a wavelength of 355 nm. Explain in a complete sentence what
fraction of the incident light passes through the polarizer? If the
light coming out of this polarizer passes through a second
polarizer that is rotated at an angle of 45o with
respect to the first polarizer, what fraction of the original laser
light will come out of...
A particular laser pointer emits a beam with an average power of
5.00 mW, and the beam has a circular cross-section with a diameter
of 3.00 mm. The beam is linearly polarized. The average intensity
of the light is 707.7 W/m2. Determine the following.
(a) the amplitude of the oscillating electric field in the laser
beam (V/m)
(b) the amplitude of the oscillating magnetic field in the laser
beam (T)
A beam of wavelength 310 nm from a laser is incident on a metal
with work function 2.7 eV. The power of the laser is 0.15 W.
(a) Does the metal emit photoelectrons? Why?
(b) What is the range of photoelectron kinetic energies emitted
by metal?
(c) What is the range of de Broglie wavelengths of these
photoelectons?
(d) How does result for part (b) change if the laser power is
doubled to 0.30 W?
Thank you.
You need to increase the distance that a KrF laser at 0.248 µm
with a beam radius of 0.322 mm can reach. To do so you need to
design a beam expander to enlarge the beam radius to 2.806 mm. You
are given second lens f2= 71.4cm. Do both Galilean and Keplerian
expander and draw the design. State what f input lens is required
and the length of the system. Make a diagram for each system. (b) What is the...
A
laser had a power output of 2mW and a beam diameter of 2mm. (A)
what is the amplitude of the electric field in the electromagnetic
waves emitted by this device? Find (b) the total energy in a 2
meter length of the laser beam and (c) the momentum transferred to
a perfect mirror by this laser beam. (D) the index of refraction of
water is about 1.33. What is the wavelength in water of a light
wave whose wavelength...