a diffraction pattern is produced on a viewing screen by illuminating a long narrow slit of...
a diffraction pattern is produced on a viewing screen by illuminating a long narrow slit of light of wavelength lamda. If lamda is increased and no other changes are made:
The correct answer is:
"The intensity at the center of thhe pattern increases and the pattern contracts toward the bright center"
why?
Homework Answers
This gives a total intensity expression:
And we know that ? =2? /? *bsin?
So with increasing lamda intensity increases and pattern contracts towards bright centre as L=? D/d
Since intensity is given by this eqn
I=IO*SIN2{? /2}* SIN2{N? /2}/{? /2}2* SIN2{? /2}*
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