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124.One face of a rectangular glass plate 6cm thick is silvered. An object held 8cm in front of the first face, forms an image 12cm behind the silvered face. The refractive index of the glass is: 1) 1.2 2) 1.6 3) 1.5 4) 1.3 |
| Answer» 124.One face of a rectangular glass plate 6cm thick is silvered. An object held 8cm in front of the first face, forms an image 12cm behind the silvered face. The refractive index of the glass is: 1) 1.2 2) 1.6 3) 1.5 4) 1.3 | |