nd is не e (d) 10 um 101. Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by 2nd radian. If there is a maximum in direction D the distance XO using n as an integer is given by D (b) in +1) (a) in - - os (d) in-1)

Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by 2 pid radian. If there is a maximum in direction D, the distance XO using n as an integer is given by

Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by 2pi//radian . If there is a maximum in direction D the distance XO using n as an integer is given by

Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by 2pi//radian . If there is a maximum in direction D the distance XO using n as an integer is given by

Four monochromatic and coherent sources of light, emitting waves in phase of wavelength lambda , are placed at the points x = 0, d 2d and 3d on the x-axis. Then

There are two coherent sources S_(1) and S_(2) which produce waves in same phase placed on Y axis at points (0, 2d) and (0, d) as shown in figure-6.23. A detector D is placed at origin which moves along X direction, find the number of maxima recorded by detector excluding points x = 0 and x = oo . Given that wavelength of light produced is 6200Å and separation between sources is 0.34 mm.

Let D={(x,y)in R^(2):x^(2)+y^(2)<=1}. then the maximum number of point in D such that the distance between any pair of point is at least 1 will be

If a. b, c and d are the coefficients of 2nd, 3rd, 4th and 5th terms respectively in the binomial expansion of (1+x)^n , then prove that a/(a+b) + c/(c+d) = 2b/(b+c)

If a. b, c and d are the coefficients of 2nd, 3rd, 4th and 5th terms respectively in the binomial expansion of (1+x)^n , then prove that a/(a+b) + c/(c+d) = 2b/(b+c)