Ray Optics and Optical Instruments

Related Questions

• Two lenses of power +12 and – 2 diopters are placed in contact. What will the focal length of combination

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• A diver in a swimming pool wants to signal his distress to a person lying on the edge of the pool by flashing his water proof flash light

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• Consider the following two statements A and B and identify the correct choice in the given answers A : Line spectra is due to atoms in gaseous stateB : Band spectra is due to molecules

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• A man can see the objects upto a distance of one metre from his eyes. For correcting his eye sight so that he can see an object at infinity, he requires a lens whose power is

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• We combined a convex lens of focal length $f_1$ and concave lens of focal lengths $f_2$ and their combined focal length was $F$. The combination of these lenses will behave like a concave lens, if

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