Question:medium
A ray of light of intensity I is incident on a parallel glass slab at point A as shown in diagram. It undergoes partial reflection and refraction. At each reflection, 25% of incident energy is reflected. The rays AB and A'B' undergo interference. The ratio of Imax and Imin is:
A ray of light of intensity I is incident on a parallel glass slab at point A as shown in diagram. It undergoes partial reflection and refraction. At each reflection, 25% of incident energy is reflected. The rays AB and A'B' undergo interference. The ratio of Imax and Imin is:
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For two-beam interference:
Imₐₓ,mᵢₙ=(√(I₁)±√(I₂))²
Always calculate intensities after each reflection/transmission.
Updated On: Mar 19, 2026
- \(49:1\)
- \(7:1\)
- \(4:1\)
- 8:1
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The Correct Option is A
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