MHT CET · Physics · Wave Optics
How is the interference pattern affected when violet light replaces sodium light?
- A The fringes become brighter.
- B The fringes become faint.
- C Fringewidth decreases.
- D Fringewidth increases.
Answer & Solution
Correct Answer
(C) Fringewidth decreases.
Step-by-step Solution
Detailed explanation
In Young's double slit experiment, Fringe width \(\mathrm{W}=\frac{\lambda \mathrm{D}}{\mathrm{d}}\)
As violet light is of smaller wavelength Fringe width decreases
As violet light is of smaller wavelength Fringe width decreases
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