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प्रश्न
Select the most appropriate word from the given box and fill in the following blanks.
| refracted diameter converging power convex small concave dioptre diverging focal length two aperture |
A lens has ______ surfaces.
रिकाम्या जागा भरा
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उत्तर
A lens has two surfaces.
Explanation:
A lens is a transparent refracting medium bounded by two curved surfaces or one curved and one plane surface.
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पाठ 2: Light - Graded Assignment 2.2 [पृष्ठ १३२]
