JEE PYQ: Wave Optics Question 6
Question 6 - 2021 (24 Feb Shift 2)
If the source of light used in a Young’s double slit experiment is changed from red to violet:
(1) the fringes will become brighter
(2) consecutive fringe lines will come closer
(3) the central bright fringe will become a dark fringe
(4) the intensity of minima will increase
Show Answer
Answer: (2)
Solution
$\beta = \frac{\lambda D}{d}$
As $\lambda_v < \lambda_R$
$\Rightarrow \beta_v < \beta_R$
$\therefore$ Consecutive fringe lines will come closer.
BETA
