Question

Define the term limit of resolution and name the factors on which it depends. How is it related to resolving power of microscope

Answer 1

Answer:

Resolving power of simple microscope depends on wavelength of light and its aperture.

Explanation:

As per Rayleigh criteria of resolution we know that the two objects are said to be well separated when central bright fringe of first object lies on the first minimum of the fringe pattern of second object

So limit of resolution is the minimum distance between two objects at which we can see two clear separated images of the objects

So we will have the limit of resolution for single slit given as

$a sin\theta = \lambda$

$\Delta x = \frac{L \lambda}{a}$

so it depends on the

i) distance of object from eye

ii) Wavelength of light

iii) size of the slit

Similarly for simple microscope we can say that due to circular aperture of lens there is slight change in the formula as

$\Delta x = \frac{1.22 f\lambda}{d}$

here we know

f = focal length of the lens

d = aperture of the lens

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Topic : Resolving power

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