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A microwave of wavelength 2 cm falls nor...

A microwave of wavelength 2 cm falls normally on a narrow slit of width 5 cm.
if the microwave falls at angle `15^(@)`, with the normal drawn in the plane of the slit, then what would be the angular width of the central maximum on either side of it? Given, `sin 23^(@)35' = 0.4, sin 15^(@) = 0.2588, sin41^(@) 13' = 0.6588 and sin8^(@)7' = 0.1412`.

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The correct Answer is:
`41^(@)`13' and `8^(@)`7'
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