Vanshika Asked a Question
September 3, 2020 11:01 ampts 30 pts
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  • Ruby negi thankyou
    multiple foci are present in zone plate.. and see the formula of rn ( radius of circles that formed) , rn is proportional to wavelength means red colour has large radius than voile...
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    Ruby negi
    best regards...
  • Mahak thankyou
    I think 1 and 4 both are corect means option a is coorect
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  • Vaishnavi rajora
    option 3 and 4 should be correct
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    Vaishnavi rajora
    https://www.osapublishing.org/ol/abstract.cfm?uri=ol-32-15-2109
  • Vanshika
    But the given answer is D i.e. 1 and 2
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