List of top Physics Questions on Optics asked in KCET

A convex lens has power \( P \). It is cut into two halves along its principal axis. Further, one piece (out of two halves) is cut into two halves perpendicular to the principal axis as shown in the figure. Choose the incorrect option for the reported lens pieces. 

A ray of light passes from vacuum into a medium of refractive index \( n \). If the angle of incidence is twice the angle of refraction, then the angle of incidence in terms of refractive index \( n \) is
The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex lens and the image at a distance of 26 cm from the lens, the new size of the image is :
Two thin biconvex lenses have focal lengths f1 and f2. A third thin biconcave lens has focal length of f3. If the two biconvex lenses are in contact, the total power of the lenses is P1. If the first convex lens is in contact with the third lens, the total power is P2. If the second lens is in contact with the third lens, the total power is P3 then
If the refractive index from air to glass is \(\frac{3}{2}\) and that from air to water is \(\frac{4}{3}\), then the ratio of focal lengths of a glass lens in water and in air is