Question

When you look at a single slit diffraction pattern produced on a screen by light of a single wavelength, you see a bright central maximum and a number of maxima on either side, their intensity decreasing with distance from the central maximum. If the wavelength of the light is increased,
a) it does not affect the size of the pattern.

b) the pattern shrinks in size. (central maximum less wide; other maxima in closer to it)

c) the pattern increases in size. (central maximum wider; other maxima farther from it)

d) the width of the central maximum increases, but the other maxima do not change in position or width.

Answer 1

Answer:

c) True.  he pattern increases in size. (central maximum wider; other maxima farther from it)

Explanation:

Let's describe the diffraction phenomenon that is explained with the equation

         a sin θ  = m λ

Where a is the width of the slit, m is the order of diffraction and λ is the incident wavelength

          sin θ = m Lam / a

           θ = sin⁻¹ (m Lam / a)

When λ increases the value of the angle increases, if we look at the pretor in a hoax located far from the slit L >> a when increasing the angle the spectrum width also increases.

If we analyze at maximum central m = 1, the relationship remains

           θ = sin⁻¹ (λ / a)

The width of the central maximum is increased, non-linearly

We analyze the other maximums in this case m> 1

Likewise, the angles increase, even when the maximum value of sin⁻¹ (1) in maximum number of secondary peaks decreases

When reviewing the answers

a) false. The width of the pattern changes

b) False. The opposite happens

c) True.

d) False all peaks change position