In the set up shown in figure dltltD and d=4lambda, find.

(a) total number of maximas and minimas on the screen
(b) y-coordinates corresponding to minima nearest to O.

In the YDSE apparatus shown in figure, dltltD and d = 6lambda . Find (a) total number of maximas and minimas on the screen . (b) two y-coordinates corresponding to third order maxima.

In the YDSE apparatus shown in figure, dltltD and d = 6lambda . Find (a) total number of maximas and minimas on the screen . (b) two y-coordinates corresponding to third order maxima.

There is a large circle (not a screen this time) around two coherent sources S_1 and S_2 kept at a distance d = 3.4 lambda . (a) Find total number of maximas on this circle. (b) Four angular positions corresponding to third order maxima on this circle.

In a YDSE, D = 1m, d = 1mm and lambda = 1//2 mm Find the no of maxima and minima obtained on the screen.

Assertion: In the YDSE apparatus shown in figure dltltD and d/lambda = 4 , then second order maxima will be obtained at theta = 30^@ Reason: Total seven maxima will be obtained on screen.

A monochromatic light of wavelength lambda is incident normally on a narrow slit of width a to produce a diffraction pattern on the screen placed at a distacne D from the slit. With the help of a relevant diagram, deduce the condition for maxima and minima on the screen. use these condition to show that angular width of central maximum is twice the angular width of secondary maximum.

In a Young's double slit experiment, the light sources is at distance l_1 = 20mu m and l_2 = 40 mu m form the main slit. The light of wavelength lambda = 500nm is incident on slits separated at a distance 10mu m . A screen is placed at a distance D = 2 away from the slits as shown in figure. Find (a) the values of theta relative to the central line where maxima appear on the screen? (b) how many maxima will appear on the screen? what should be the minimum thickness of a slab of refractive index 1.5 placed on the path of one of the ray so that minima occurs at C ? .