1) Define Diffraction?
Ans: The phenomenon of bending of light waves around the edges of obstacles and their spreading into the geometrical shadow of the obstacle is called diffraction of light.
2) Mention the two types of diffraction?
Ans: i) Fresnel diffraction
ii)Fraunhofer diffraction
3) What is the type of diffraction in the diffraction grating experiment?
Ans: Fraunhofer diffraction is involved because the source and the screen are effectively at infinite distance.
4) What is grating?
Ans: A grating is a plane glass plate on which a large number of opaque rulings are drawn at equidistance with a diamond head.
Ans: The phenomenon of bending of light waves around the edges of obstacles and their spreading into the geometrical shadow of the obstacle is called diffraction of light.
2) Mention the two types of diffraction?
Ans: i) Fresnel diffraction
ii)Fraunhofer diffraction
3) What is the type of diffraction in the diffraction grating experiment?
Ans: Fraunhofer diffraction is involved because the source and the screen are effectively at infinite distance.
4) What is grating?
Ans: A grating is a plane glass plate on which a large number of opaque rulings are drawn at equidistance with a diamond head.
thanks for the help!!
ReplyDeleteThankya
ReplyDeleteI did not understand that part how the light source and screen are at an infinite distance.
ReplyDeleteThere a convex lens is used so tgat light bim are turned to plane wavefront
DeleteInfinte distance means rays of light should be parallel.....nd see we get parallel rays from collimator..that means...we can assume that...source and screen are at infinite distance
Deletethank you
DeleteIt is written the effective distance between them is infinite.... Because the light wave incident on grating is a plane wave , so it seems as if the source is at infinite distance.
DeleteI need more questions with answers regarding deffraction grating
ReplyDeleteI'm also
DeleteVery nice concept
ReplyDeleteVery nice concept
ReplyDeleteI have some doubts
ReplyDeletethanks for the questions
ReplyDeleteWhat happen if we touch grating by finger
ReplyDeleteMaybe due to impurities, it can cause extra spectral lines beside the original one
Deletenot sufficient
ReplyDeleteNot sufficient
ReplyDeleteNot sufficient
ReplyDeleteHow the grating is at infinite distance
ReplyDeleteMore questions please
ReplyDeleteThanks for questions.its very helpful
ReplyDeleteWe need some extra questions
ReplyDeleteSome extra material 😒
ReplyDeleteThanks for this result so easy and memorable
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ReplyDelete