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Thursday 21 July, 2011

value of a smile

When life give you a thousand reasons to cry.Show the world that you have million reasons to smile.

Tuesday 19 July, 2011

conditions for interference

1. The waves emitted from the two or more light sources are  coherent.  

 2. The distance between the two sources should be small.

3. The distance between the two sources and the screen should be large.

4. The background of the screen should be dark.

5.The amplitudes of the light waves should be equal or nearly equal.

6. The sources should be narrow.

7. The sources should be monochromatic.

8.The waves emitted from the two or more light sources have same amplitude,wavelength and frequency.

definition of interference

The phenomenon of redistribution of light energy due to the superposition of light waves from two or more coherent sources is known as interference.

optics

The main characteristics of light  are INTERFERENCE, DIFFRACTION and POLARIZATION.