AP EAMCET · PHYSICS · Wave Optics
Fresnel diffraction is produced due to light rays falling on a small obstacle. The intensity of light at a point on a screen beyond an obstacle depends on
- A the focal length of lens used for observation
- B the number of half-period zones that superpose at the point
- C the square of the sum of the number of half period zones
- D the thickness of the obstacle
Answer & Solution
Correct Answer
(B) the number of half-period zones that superpose at the point
Step-by-step Solution
Detailed explanation
In Fresnel diffraction, no lenses are required for rendering light rays parallel and also the diffraction pattern may be dark or bright depending upon the number of half-period zones that superpose at the point. Hence, the intensity of light at a point a screen beyond or…
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