Question
Question: If a polariser is attached in front of two slits in YDSE such that axis of polariser are perpendicul...
If a polariser is attached in front of two slits in YDSE such that axis of polariser are perpendicular to each other then:
A
no fringes are formed.
B
fringe patteren is shifted.
C
no change obsvived
D
?
Answer
no fringes are formed.
Explanation
Solution
For interference to occur, two waves must be coherent and similarly polarized. If polarizers with perpendicular axes are placed in front of the slits, the light emerging from the two slits will be perpendicularly polarized. Perpendicularly polarized light waves cannot interfere to form an observable interference pattern. Hence, no fringes are formed; the screen will be uniformly illuminated.