Question

When a red light passing through a prism is replaced with a blue light how will the focal length change
E

Answer 1

When white light passes through a lens or a prism, blue light is bent more than red light. When seen through a lens, thischange of index of refractionwith wavelength is called chromatic aberration, thechange in focal length for different wavelengths of light. Figure 7.

Medium: Refractive Index

Ti White: 2.5

Water: 1.33

Co Green: 2.00