Q. 17

# For the same objective, find the ratio of the least separation between two points to be distinguished by a microscope for light of and electrons accelerated through 100V used as the illuminating substance.

Answer :

Given λ= = 5 ×10^{-7} m, V=100 V

We know,

Where d_{min} is the least separation, λ is the wavelength, n is the refractive index, β is the angle subtended.

Case 1:

Case 2:

De-Broglie wavelength of electron accelerated through Voltage is defined as

where h is the Planck’s constant, m is the mass of electron, e is the charge of electron and V is the Voltage

Substituting corresponding values we get,

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PREVIOUSCan reflection result in plane polarized light if the light is incident on the interface from the side with higher refractive index?NEXTConsider a two slit interference arrangements (Fig. 10.4) such that the distance of the screen from the slits is half the distance between the slits. Obtain the value of D in terms of such that the first minima on the screen falls at a distance D from the centre O.

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