A lens whose focal length is 40 cm forms a Fraunhofer diffraction of 50 cm and the distance width 0.3 m m . The distance of the first dark band from the direct one is is 0.785 mm. calculate the wavelength of light.

A lens whose focal length is 40 cm forms a Fraunhofer diffraction of 5

1.	A lens whose focal length is 40 cm forms a Fraunhofer diffraction of 50 cm and the distance width 0.3 m m . The distance of the first dark band from the direct one is is 0.785 mm. calculate the wavelength of light.
Answer» SOLUTION :5889.5 Å

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A lens whose focal length is 40 cm forms a Fraunhofer diffraction of 50 cm and the distance width 0.3 m m . The distance of the first dark band from the direct one is is 0.785 mm. calculate the wavelength of light.

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