Diffraction Flashcards
1
Q
What’s diffraction
A
It’s a phenomenon wherein light rays deviate from there original paths and bend round the sharp edges of the obstacles that they encounter on their way
2
Q
Why does diffraction occur
A
It occurs due to bending of light round the edges of obstacles
3
Q
Difraction is divided into ?
A
1] Fraunhaufers diffraction
2] Fresnels diffraction
4
Q
Bright fringes for diffraction
A
dsin@ =(2n +1)wavelength Or 0
5
Q
Dark fringes for diffraction
A
dsin@ = n x wavelength
6
Q
Angular width of central max for diffraction
A
2 x wavelength/d
7
Q
Linear width of central maximum for diffraction
A
2f x wavelength/d
8
Q
General condition for applicability for Fraunhaufers diffraction is
A
d^2/ (wavelength x D)
