Question

Part A (For a Single Slit) a) As the wavelength decreases, what happens to the width of the central, bright fringe?

b) What significant changes do you observe as you increase the slit width?

Part B (For Double Slit)

a) As the wavelength increases, what happens to the distance between the two successive maxima within the envelope?

b) As the slit width increases, what happens to the distance between the two successive maxima within the envelope?

c) As the slit spacing increases, what happens to the distance between the two successive maxima within the envelope?

d) What other major observations and conclusions you may add?

Answer 1

A. a.) because the top central maximum is directly proportional to the length hence decreasing the wavelength will decrease the central maxima's width

b.) Will decrease central maximum width. But will increase intensity of maximas

B...

a.) as wavelength increases the distance between two successive maximum will also increase

b.)With increase in slit width no significant change appears.

c.) As slit spacing increases the distance between two maximum will increase

d.) we can conclude that only factor that causes the change in the distance of two consecutive maximum are wavelength, slit separation and the distance of the screen to the slit