question_answer

In a double -slit experiment, green light (\[5303\text{ }{\AA}\]) falls on a double slit having a separation of 19.44\[\mu m\] and a width of 4.05\[\mu m\]. The number of bright fringes between the first and the second diffraction minima is- [JEE Main 11-Jan-2019 Evening]

A) 10

B) 04

C) 05

D) 09

Correct Answer: C

Solution :

[c]: ,

For diffraction location of first minima;

Location of second minima,

For interference,

Also,

Number of bright fringes correspond to n = 5, 6, 7, 8, 9.