.......... helps the eye to adjust the focal length of the lens.
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Who is the singer and composer of official Anthem for “Bharat ke Veer” initiative?
sinA/(1 + cos A) is equal to
Which one of the following triad represents Dobereiner's Triad?
Pipes A and B, when working together, can fill an empty tank in 8 hours. If B is stopped after 2 hours, it will take a total of 11 hrs to fill the tank. How long would it take A to fill the empty tank alone?
An object is composed of
Majority of the fungal bionts of lichens belong to
Which of the following is not a commercial source of energy?