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Beam Laser Pointer

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Hi-Output Laser Pointer Key Chain w/ 12 heads - Red Beam
Hi-Output Laser Pointer Key Chain w/ 12 heads - Red Beam
US $1.05
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3pcs Lot new 3 Color Red + Green + Blue Laser 5mW Ray Beam Laser Pointer pens
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Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
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New Stylish Astronomy 1mW Green Beam Laser Pointer Pen
US $7.99
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Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
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Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
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Green Laser Beam Pointer Pen 1 mw 532nm Astronomy 2 AAA
Green Laser Beam Pointer Pen 1 mw 532nm Astronomy 2 AAA
US $7.39
 Powerful Premium Grade Green Beam Laser Pointer Pen DL2
Powerful Premium Grade Green Beam Laser Pointer Pen DL2
US $7.50
 NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
US $.90
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New Powerful 532nm Green Laser Pen Pointer Beam 5mw Teacher Gift Play Party&Job
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5mW 532nm Astronomy Mid-open Green Beam Light Laser Pointer Pen
5mW 532nm Astronomy Mid-open Green Beam Light Laser Pointer Pen
US $8.39
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NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
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 5mW 5 mW 532nm Green Beam Laser Pointer Pen Point
5mW 5 mW 532nm Green Beam Laser Pointer Pen Point
US $9.99
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3pcs Lot new 3 Color Red + Green + Blue Laser 5mW Ray Beam Laser Pointer pens
US $.96
 5mW Green HIGH POWER BEAM Laser Pointer Black Pen SALE
5mW Green HIGH POWER BEAM Laser Pointer Black Pen SALE
US $8.99
5mW 532nm Green Beam Laser Pointer Pen *Special Offer*
5mW 532nm Green Beam Laser Pointer Pen *Special Offer*
US $9.49
 Green Beam Laser Pointer Pen 5mW 532nm Perfect Finish
Green Beam Laser Pointer Pen 5mW 532nm Perfect Finish
US $9.98
 1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
US $.94
 3 Sets 5mW Laser Pointer with Green Red Purple 3 Color Laser Beam Ray
3 Sets 5mW Laser Pointer with Green Red Purple 3 Color Laser Beam Ray
US $9.99
1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
US $.94
 1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
US $.94
 3pcs/lot 5mW Ray Beam Laser Pointer with 3 Color Red Purple Green Ray Laser Pens
3pcs/lot 5mW Ray Beam Laser Pointer with 3 Color Red Purple Green Ray Laser Pens
US $16.99
 Newest 5mw Green Laser Pointer Pen 532nm Bright High Powerful Light Beam
Newest 5mw Green Laser Pointer Pen 532nm Bright High Powerful Light Beam
US $5.98
1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
US $.94
 5mW Military Green Beam Bright Laser Pointer + 220 Lm Zoom Focus CREE Headlamp
5mW Military Green Beam Bright Laser Pointer + 220 Lm Zoom Focus CREE Headlamp
US $18.99
 1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
US $.94
 Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.90
GREEN Laser Pointer Pen 5mW Barely Legal Ultra Powerful Beam Astronom Z5
GREEN Laser Pointer Pen 5mW Barely Legal Ultra Powerful Beam Astronom Z5
US $24.99
 Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.90
 Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.85
 Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.90
NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
US $.90
 1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
US $.94
 NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
US $.90
 Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.85
NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
US $.90
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Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.90
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NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
US $.90
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Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.90
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.85
 Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.90
 NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
US $.90
 NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
US $.90
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.85
 1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
1mw 532nm Green Beam Laser Pen Lazer Pointer LED Torch Flashlight Ray Light
US $.94
 NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
US $.90
 405nm Blue Beam Laser Pen Violet Purple Lazer Pointer LED Bright Light Ray 1mw
405nm Blue Beam Laser Pen Violet Purple Lazer Pointer LED Bright Light Ray 1mw
US $.94
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.90
 NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
NEW Ultra Powerful Red Laser Pen Pointer Beam Light 5mW
US $.90
 Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
Newest 5mW 5 mW 532nm Green Beam Laser Pointer Pen
US $.90
 ASTRONOMY MILITARY GREEN BEAM LASER POINTER TACTICAL 5mW
ASTRONOMY MILITARY GREEN BEAM LASER POINTER TACTICAL 5mW
US $7.50
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Beam Laser Pointer
A small laser used as a pointer produces a beam of red light 7 mm in diameter, and has a power output of 8 mil?

A small laser used as a pointer produces a beam of red light 7 mm in diameter, and has a power output of 8 milliwatts. What is the magnitude of the electric field in the laser beam?

The intensity of the beam I = P/A = 8.0x10^-3W/(pi*r^2) = 8.0x10^-3/(pi*(3.5x10^-3)^2) = 208W/m^2

The intensity is also = Emax^2/(2*muo*c) so

Emax = sqrt(2*muo*c*I) = sqrt(2*4pix10^-7*3.0x10^8*208) = 396V/m



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Written by admin

April 16th, 2008 at 10:19 pm

Posted in Stage Effects

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