Hello mam, i wanted to know that how can light bend at corners of an obstacle or an aperture according to diffraction, if it travels in a straight line?

Asked by AKSHAYA V | 7th Feb, 2014, 03:46: PM

Expert Answer:

Light travels in a straight line. But, light is a form of wave.
 
When light is emitted from a source, every point in the wave acts as a secondary source of light.
 
Thus, when the light encounters an obstacle, that point acts as a secondary source and the original light and the secondary source interfere and they form a diffraction pattern.
 
This pattern indicates that the light is bent at an angle.

Answered by  | 10th Feb, 2014, 12:19: PM

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