In Young's double slit experiment, fringes of width β are produced on the screen kept at a distance of 1m 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 light used is __________nm.

Ruhul Amin Alig

Question: From NCERT | CUET || [Difficult level:Medium] Subtopic:Young's double slit experiment ||

In Young's double slit experiment, fringes of width $β$ are produced on the screen kept at a distance of $1 m$ from the slit. When the screen is moved away by $5 \times 10^{- 2} m$ , fringe width changes by $3 \times 10^{- 5} m$ . The separation between the slits is $1 \times 10^{- 3} m$ . The wavelength of light used is __________ $n m$ .

Medium