Magnesium vapor green light (518.36 nm) impinge on a very long and narrow slit (0.25 mm) in a opaque screen. A large lens with a focal length of 65 cm is located very close to the gap. Determine width of Central maximum created by the lens on the viewing screen in meters.

Magnesium vapor green light (518.36 nm) impinge on a very long and narrow slit (0.25 mm) in a opaque screen. A large lens with a focal length of 65 cm is located very close to the gap. Determine width of Central maximum created by the lens on the viewing screen in meters.

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Optics:
Magnesium vapor green light (518.36 nm) impinge on a very long and narrow slit (0.25 mm) in a opaque screen. A large lens with a focal length of 65 cm is located very close to the gap. Determine width of Central maximum created by the lens on the viewing screen in meters.