Phy
Geometrical Optics
Lens Formula and Image Formation
11
⚡ Quick Summary
Deals with image formation by convex lens, involving calculations of object and image distances using the lens formula. Includes the effect of inserting a glass plate between the lens and the screen, which shifts the image.
['1/f = 1/v - 1/u', 'Shift due to glass plate = t(1 - 1/μ)', '1/F = 1/f1 + 1/f2 - d/(f1*f2)']
Lens formula is used to find the focal length of a lens and to calculate the object or image distance when the other is known. The shift in image position due to the insertion of a glass plate is also considered.