Question:
The shape of air film formed between the plano-convex lens and the glass slab in Newton’s ring experiment is
The shape of air film formed between the plano-convex lens and the glass slab in Newton’s ring experiment is
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Newton’s rings result from the interference of light in the wedge-shaped air gap between the lens and the glass plate.
Updated On: Jan 17, 2026
- Rectangular shape
- Uniform thickness
- Wedge shape
- No air film is formed
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The Correct Option is C
Solution and Explanation
When a plano-convex lens is placed on a glass slab, an air film is formed which is wedge-shaped. The film thickness gradually changes from the point of contact (negligible thickness) outward.
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