In X-ray diffraction experiment at which one of the following path difference between the two waves , destructive interference is observed (gamma=wavelength of x-rays)

In X-ray diffraction experiment at which one of the following path dif

1.	In X-ray diffraction experiment at which one of the following path difference between the two waves , destructive interference is observed (gamma=wavelength of x-rays)
Answer» `LAMBDA` `2lamdba` `3lambda` `1.5lambda` ANSWER :4