Question 1 consists of parts a and b 1a) The intensity of the first maxima beyon

Question

Question 1 consists of parts a and b

1a) The intensity of the first maxima beyond the central maximum is approximately what percentage of the intensity of the central maximum?

A) 50 %

B) 25 %

C) 5 %

D) It depends on the width of the slit

1b) The diffraction pattern of a single slit is observed with green light. The green light is then replaced by red light . Which of the following chnages will allow the locations of the diffraction minima on the screen to remain unaffected by the change in color?

A) Increase the width of the slit

B) Decrease the width of the slit

C) Move the lens-screen combination away from the slit

D) Increase the intensity of the light source

Explanation / Answer

1a)

Depends on width of the slit

b) Since lambda increases

in order to maintain same location for minima we should increase the width of the slit

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