this is a question from the book of Explaining Physics GCSE edition by Stephen Pople.
2007-08-12 04:10:41 · 4 answers · asked by Mia S 1 in Science & Mathematics ➔ Physics
This is caused by aberrations. Two examples of aberrations are chromatic aberration and spherical aberration.
Chromatic aberration refers to different wavelengths getting focused differently because the index of refraction depends on wavelength. Spherical aberration refers to the curvature actually not being ideal for focusing rays to one point.
2007-08-12 04:48:02 · answer #1 · answered by duh 2 · 2⤊ 0⤋
The degree of precision required to focus a beam of light into a singularity is not achievable.
2007-08-15 07:06:41 · answer #2 · answered by johnandeileen2000 7 · 0⤊ 0⤋
Chromatic aberration and spherical aberration are the reasons. One of the answerers has explained it nicely.
2007-08-12 05:32:16 · answer #3 · answered by Swamy 7 · 1⤊ 0⤋
maybe the lens is distorted somewhat?
what if the lens were not fully transparent?
2007-08-12 04:25:53 · answer #4 · answered by Anonymous · 0⤊ 0⤋