In an experiment to measure the wavelength of light in air, two slits are illuminated with white light and their images are obtained on a screen. For best results: 5 A the slit to screen distance should be at least 3.00 m. the light used can be a mixture of coloured light. the light used should be obtained from a LASER source; D B the slit width should be made smaller than the wavelength of light.

In an experiment to measure the wavelength of light in air, two slits are illuminated with white light and their images are obtained on a screen. For best results: 5 A the slit to screen distance should be at least 3.00 m. the light used can be a mixture of coloured light. the light used should be obtained from a LASER source; D B the slit width should be made smaller than the wavelength of light.