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Sahay Sir > Question Answers > NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 32 - Ray Optics > In Young’s double slit experiment the separation d between the slits is 2mm, the wavelength λ of light used is 5896 A and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20 degree. To increase the fringe angular width to 0.21 degree (with same λ and D) the separation between the slits needs to be changed to

In Young’s double slit experiment the separation d between the slits is 2mm, the wavelength λ of light used is 5896 A and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20 degree. To increase the fringe angular width to 0.21 degree (with same λ and D) the separation between the slits needs to be changed to

In a diffraction pattern due to a single slit of width a In Young's double slit experiment the separation d between the slits is 2mm the first minimum is observed at an angle 30 degree∘ when light of wavelength 5000 Å is incident on the slit. The first secondary minimum is observed at an angle of