First slide

Resolving power of optical instruments

Question

When a beam of light is used to determine the position of an object, the maximum accuracy is achieved if the light is

Easy

A

Polarised
B

Of longer wavelength
C

Of shorter wavelength
D

Of high intensity

Solution

When a beam of light is used to determine the position of an object, the maximum accuracy is achieved if the light is of shorter wavelength, because
$Accuracy \propto \frac{1}{Wavelength}$

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