An air bubble in water will act like a
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Explanation:
The lens which have atleast one inward curved surface is a concave lens. Concave ens is a diverging lens as it spreads out light rays that have been refracted through it.
A concave lens is thinner at its centre than at its edges.
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Explanation:
A colourful interference pattern is observed due to thin film interference when light rays reflected from upper and bottom thin films of air bubbles.. It's look like like a colourful patterend air bubble..
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