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InterviewSolution
| 1. |
An achromatic combination of lenses is formed by joining : (a) 2 concave lenses (b) 1 convex and 1 plane mirror (c) 2 convex lenses (d) 1 convex and 1 concave lens |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (d) 1 convex and 1 concave lens</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">A combination of lenses by which images of different colours of an object are formed at any point, is called the achromatic combination of lenses. To obtain an achromatic combination of lenses, a convex lens of crown glass is placed in contact with a concave lens of flint glass and they are joined together by the transparent canada balsam layer.</span></span></p> | |