Question

In an experiment to measure the wavelength of light using adouble slit, it is found that the fringes are too close together toeasily count them. To spread out the fringe pattern, one could:A. decrease the slit separationB. increase the slit separationC. neither of these will spread out the pattern

Answer 1

A. decrease the slit separation

Step-by-step explanation:

Double slit experiment was done to study the phenomenon of interference of light. It gives a definitive proof of wave nature of light.

In the double slit experiment

the distance between the fringes in the interference pattern is given by

`\Delta y = (\lambda D)/(d)`

D= distance between the slit and the screen

d= distance between the slits

λ= wavelength

therefore, and increase in Δy may decrease d that is

:A. decrease the slit separation