Saved Bookmarks
| 1. |
Two coherent light sources A and B with separation 2 lamdaare placed on the x-axis symmetrically about the origin. They emit light of wavelength lamda. Obtain the positions of maxima on a circle of large radius, lying in the x-y plane and with centre at the origin. |
Answer» Solution : For P to have maximum intensity, d cos `theta =n lamda` `2 lamda cos theta = n lamda RARR cos theta =n/2 ` where n is integer For `n = 0, theta =90^@ , 270^@` `n= pm 1, theta =60^@ , 120^@ , 240^@, 300^2` `n = pm2, theta =0^@ , 180^@` So, POSITIONS of MAXIMA are at `theta = 0^@ , 60^@ , 90^@ , 120^@ , 180^@, 240^@, 270^@` and `300^@`i.e., 8 positions will be obtained. |
|