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Limit of Resolution

The resolving...

Question

The resolving power of an electron microscope is higher than that of an optical microscope because the wavelength of electrons is ________ than the wavelength of visible light.

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Solution

The resolving power of a magnification device is inversely proportional to the wavelength used. The resolving power of an electron microscope is higher than that of an optical microscope because the wavelength of electrons is smaller than the wavelength of visible light.

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Similar questions

Q. In an electron microscope, electrons accelerated by a voltage of

50 kV

are used. In an optical microscope of the same aperture, yellow light of wavelength

5900 ˚ A

is used. The resolving power of the electron microscope will be

n

times higher than that of the optical microscope, where

n

is of the order of

Q. The resolving power of an electron microscope is much higher than that of an ordinary light microscope because resolving power increases.

Q. Given below are two statements : one is labelled as Assertion

A

and the other is labelled as Reason

R

A

: An electron microscope can achieve better resolving power than an optical microscope.

Reason

R

: The de Broglie's wavelength of the electrons emitted from an electron gun is much less than wavelength of visible light.

In the light of the above statements, choose the correct answer from the options given below:

Q. An electron microscope uses electrons accelerated by a voltage of 50 kV. Determine the de-Broglie wavelength associated with the electrons. Taking other factors, such as numerical aperture etc., to be same, how does the resolving power of an electron microscope compare with that of an optical microscope which used yellow light?

Q. When an object is viewed using light of wavelength

6000 ˚ A

under a microscope, the resolving power of the microscope is

10^{4}

. Find the resolving power of the microscope, when the same object is viewed using light of wavelength

4000 ˚ A

?

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Limit of Resolution

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