Momentum Laser

February 6, 2010 7:56 pm | Surveying Equipment

Consider a beam of light from a diode laser. The wavelength of the light is = 600 nm, the diameter of the beam?

Consider a beam of light from a diode laser. The wavelength of the light is = 600 nm, the diameter of the beam is 2.00 mm and the power is 0.50W. Answer the following questions;
a. What is the frequency of the light?
b. What is the energy per photon?
c. What is the momentum per photon?
d. What is its wavelength as it passes through glass (n = 1.50)?
e. What is the amplitude of the electric field?
f. What is the amplitude of the magnetic field?

a. What is the frequency of the light?
f = c/λ = 3e8/ 600e-9 = 5.e14 Hz

b. What is the energy per photon?
hf = 6.626e-34*5.e14 = 3.313e-19 J

c. What is the momentum per photon?
hc = 6.626e-34*3e8 = 1.9878e-25 kg m/s
Or
E* λ =3.313e-19*600e-9 = 1.9878e-25 kgm/s

d. What is its wavelength as it passes through glass (n = 1.50)?
λ(glass) = λ(air) / μ = 600e-9/1.5 =400e-9 m

e. What is the amplitude of the electric field?
E= √ (2*energy density/ ξo)

f. What is the amplitude of the magnetic field?
B = √ ( 2*energy density*μo)
======================

Momentum Laser chalkline
Momentum Laser chalkline
$79.99
Time Remaining: 1d 9h 12m

Momentum S688645 Laser Chalkline Super Pro Pack Layout Kit
Momentum S688645 Laser Chalkline Super Pro Pack Layout Kit
$149.00
Time Remaining: 3d 11h 58m

MOMENTUM LASER CHALK LINE XL KIT BRAND NEW
MOMENTUM LASER CHALK LINE XL KIT BRAND NEW
$150.00
Time Remaining: 15d 6h 27m
Buy It Now for only: $150.00

Momentum ROTARY LASER with Case  Accessories
Momentum ROTARY LASER with Case Accessories
$170.00
Time Remaining: 16d 7h 7m
Buy It Now for only: $170.00


Tags: , , , , , , , , ,