InterviewSolution
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InterviewSolution
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When do we use plane and concave mirror and diaphragm? |
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Answer» a. Concave mirror is used when low-power objective lenses (useful for examining large specimens or many smaller specimens) or high-power objective lenses (useful for observing fine detail) are used, whereas plane mirror is used when oil immersion objective lens is used. b. The amount of light passing on to the specimen from the condenser (which concentrates and controls the light that passes through the specimen) is regulated by using iris diaphragm. c. Light is reduced by closing the diaphragm partially for use with dry objectives. d. Oil immersion objectives require maximum light and this can be achieved by keeping the iris diaphragm fully open. |
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