How the focal length of a convex lens changes,with increase in wavelength on incident light?
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if we move object or mirrors the focal length change
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Very Good question. thanks for asking !!!
The refractive index of material of a lens decreases with increase in wavelength of incident light.
Focal length of lens increases with decrease in refractive index of medium.
Formula :
Lens makers formula 1/f =(n-1) (1/R1-1/R2)
Conclusion : focal length of a convex lens increases ,with increase in wavelength on incident light
The refractive index of material of a lens decreases with increase in wavelength of incident light.
Focal length of lens increases with decrease in refractive index of medium.
Formula :
Lens makers formula 1/f =(n-1) (1/R1-1/R2)
Conclusion : focal length of a convex lens increases ,with increase in wavelength on incident light
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