Question

please explain about glancing angle and angle of deviation in optics please dont say wrong answers I request you​

Answer 1

the angle equal to the difference between the angle of incidence and the angle of refraction of a ray of light passing through the surface between one medium and another of different index.

the angle equal to the difference between the angle of incidence and the angle of refraction of a ray of light passing through the surface between one medium and another of different refractive index.

Definition of glancing angle. : the angle between an incident beam (as of X rays or electrons) and the surface upon which it is incident : the complement of the angle of incidence.

The reflected (glancing) angle θ, as shown by experiment, is equal to the incident angle θ. ... But, from geometry, CB and BD are equal to each other and to the distance d times the sine of the reflected angle θ, or d sin θ. Thus, nλ = 2d sin θ, which is the Bragg law.