Question

9) a) A point source is located 2 m from me. If the light travels 1 m beyond me where it hits a lens, what is the radius of curvature of the wavefront at the lens? b) If the light is focused by the lens to a point 25 cm beyond the lens, what is the radius of curvature of the wavefront leaving the lens? c) Sketch these wavefronts and the paths of 2 light rays through the lens. (See beginning of reflection, refraction notes).

          9) a) A point source is located 2 m from me. If the light travels 1 m beyond me where it hits a lens, what is the radius of curvature of the wavefront at the lens?
b) If the light is focused by the lens to a point 25 cm beyond the lens, what is the radius of curvature of the wavefront leaving the lens?
c) Sketch these wavefronts and the paths of 2 light rays through the lens. (See beginning of reflection, refraction notes).

$9) a) A point source is located 2 m from me. If the light travels 1 m beyond me where it hits a lens, what is the radius of curvature of the wavefront at the lens? b) If the light is focused by the lens to a point 25 cm beyond the lens, what is the radius of curvature of the wavefront leaving the lens? c) Sketch these wavefronts and the paths of 2 light rays through the lens. (See beginning of reflection, refraction notes).$

Added by Jennifer R.

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