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Ananya Shree

Class 12th
Physics
2 years ago

Will the focal length of a lens for red light be more, same or less than that for blue light?

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Muskan Anand

2 years ago

By len`s maker formula  f1​=(μ2​μ1​​−1)(r1​1​−r2​1​) The refactive index of red light is less then refractive index of blue light . μr​<μb​ Hence fr​1​<fb​1​ Therefore , fr​>fb​

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