Diffraction and interference of light
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- Two slits experiment is performed to measure the wavelength of red light. The silts are 0.0160 mm apart. A screen is placed 0.500m away and the separation between the central bright line and the first-order bright line is found to be 21.1mm. What is the wavelength of the red light?
- Yellow- orange lamp from a sodium lamp of wavelength 597 nm is aimed at two slits separated by 1.80 x 10-6
m. What is the distance from the central line to the first-order yellow line if the screen is 0.400m from the slits?
- A monochromatic light of wavelength of 456nm falls on a single-slit with width 0.085mm. The slit is located 65cm from the screen. How far from the center of the central band is the first dark band?
- Light from a He-Ne laser () falls on a slit of unknown width. A pattern is formed on a screen 1.12m away on which the first dark band is 5.7mm from the center of the central bright band. How wide is the slit?