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A person wants to use +20 D lens as simple microscope. If the person uses +1.5 D glasses to have normal vision from 25cm onwards. What maximum magnification can the person achieve if he uses microscope without the glasses ? |{:(0,1,2,3,4,5,6,7,8,9):}|

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Magnification of simple microscope is found to be 3 when image is formed at least distance for clear vision. What will be the magnification of simple microscope when final image is formed at infinity ? |{:(0,1,2,3,4,5,6,7,8,9):}|

The speed of electron in a scanning electron microscope is 1 xx 10^(7) ms^(-1) . If the protons having the same speed are used instead of electrons, then resolving power of scanning proton microscope will be changed by a factor of:

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