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In diffraction from a single slit, the angular width of the central maxima does not depend on

a)

 of light used

b)

Width of slit

c)

Distance of slits from screen

d)

Ratio of  and slit width


Question ID - 150088 | Toppr Answer

In diffraction from a single slit, the angular width of the central maxima does not depend on

a)

 of light used

b)

Width of slit

c)

Distance of slits from screen

d)

Ratio of  and slit width

1 Answer - 5876 Votes

3537

Answer Key : (c) -

(c)

For a slit of width  light of wavelength  when light falls on the slit, the diffraction patterns so obtained as

The first diffraction minimum occurs at the angles given by

From the equation, it is clear that width of the central diffraction maximum is inversely proportional to the width of the slit.  On increasing the width size , the angle   at which the intensity first becomes zero decreases, resulting in a narrower central band and if the slit width is made smaller, the angle  increases, giving a wider central band.



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