Asked by  | 23rd Apr, 2008, 08:03: PM

Expert Answer:

for a ray passing throught the optical centre of the lens, the incident and emergent ray are parallel but there is a lateral displacement b\w them, this displacement decreases as the thickness of the lens decreases and is negligible in a thin lens. Hence a ray passing through  the optical centre of a thin glass goes straight without any deviation or displacement,.

Answered by  | 13th Jun, 2008, 08:14: PM

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