Question 120: Wave Optics

Question

If the source of light used in a Young's double slit experiment is changed from red to violet :

Accepted Answer

According to Young's double slit experiment, the distance of nth bright fringe from the centre,
$${y_n} = {{n\lambda D} \over d}$$
Since, $${\lambda _{violet}} < {\lambda _{red}}$$
$$	herefore$$ $${y_{violet}} < {y_{red}}$$
$$	herefore$$ Consecutive fringe lines will come closer.

Answer

the fringes will become brighter.

Answer

the intensity of minima will increase.

Answer

consecutive fringe lines will come closer.

Answer

the central bright fringe will become a dark fringe.

Wave Optics

If the source of light used in a Young's double slit experiment is changed from red to violet :

Choose the correct answer: