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| 1. |
Concave mirrors A and B each focal length - 15 cm. Concave mirror A has a larger aperture than B. Which of these will form a sharper image ? Why ? |
| Answer» Solution :APERTURE determines the AMOUNT of LIGHT received by the spherical mirror : A spherical mirror forms a sharp image, when its aperture is small when compared to its focal LENGTH. THEREFORE concave mirror B will form a sharper image. | |