KCET2012PhysicsWave Optics
In Young's double slit experiment, fringes of width are produced on a screen kept at a distance of 1 ~m from the slit. When the screen is moved away by 5 10⁻² ~m , fringe width changes by 3 10⁻⁵ ~m . The separation between the slits is 1 10⁻³ ~m . The wavelength of the light used is
Options
- A400 ~nm
- B500 ~nm
- C600 ~nm
- D700 ~nm
Correct answer
C. 600 ~nm
Step-by-step solution
In YDSE, we have aligned & Wavelength aligned &= d D = 3 10⁻⁵ 1 10⁻³ 5 10⁻² &=6 10⁻⁷ ~m aligned & or =600 ~nm aligned