How can fringe width increase in Young's double slit experiment?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → by reducing the separation of the slits
In young's Double slit experiment, the fringe width (β) is -
$β=\frac{λD}{d}$
$λ$ → Wavelength of light
D → Distance between screen and slits
d → Distance between two slits
∴ On reducing the separation between the slits fringe width (β) can be increased.