Intensities of an ordinary light and laser light, Physics

Intensities of an ordinary light and laser light

The intensity (I) of a wave is the energy per unit time flowing through a unit normal area. The light from an ordinary light source spreads out uniformly in all directions and forms spherical wavefronts around it.
If you look at a 100 watt lamp filament from a distance of 30 cm, the power entering your eye is less than a watt.
In case of a laser light energy is emitted in small region of space and in a small wavelength range and hence is said to be of great intensity as shown below. If you look directly along the beam from the laser (we should never do), then the power in the laser would enter your eye. Thus, even a 1 watt laser would appear many thousand times more intense that 100 watt ordinary lamp. For certain lasers, the intensity is so enormous that a power of 1015 watt can be concentrated into an area of 1 sqcm.

2484_Intensities of an ordinary light and laser light.png

Posted Date: 8/29/2012 3:08:47 AM | Location : United States







Related Discussions:- Intensities of an ordinary light and laser light, Assignment Help, Ask Question on Intensities of an ordinary light and laser light, Get Answer, Expert's Help, Intensities of an ordinary light and laser light Discussions

Write discussion on Intensities of an ordinary light and laser light
Your posts are moderated
Related Questions
What are bare fibers? It used mostly with PMMA fibers and refers to the optics which have no external protection sheath.

How is laser in heat treatment use as nuclear fusion? Nuclear fusion A few of the world's most powerful and complicated arrangements of multiple lasers and optical amplifier


tell the fixed transistor bias and describe the design


What are the basic components of Lead Acid cell? Ans. Basic components of Lead Acid cells are: a) Positive Plates, which are tubular n shape, prepared by PBO 2 b) Negativ

Explain the combined resistance of three resistors connected in series with resistance of 20 ohm, 30 ohm and 40 ohm? (Solve problems with resistors in sequence)              20Ω

A certain machine exerts a force of 200 newtons on a box whose mass is 30 kilograms.  The machine moves the box a distance of 20 meters along a horizontal floor. What amount of wor

how zeener diode work as a regulator?

its characteristic and working