List of top Physics Questions on Ray optics and optical instruments asked in VITEEE

If the speed of light in a medium is \(2 \times 10^8 \, \text{m/s}\), what is the refractive index of the medium?
A convex lens has a focal length of 10 cm. What is the magnification produced when the object is placed 30 cm from the lens?
What is the focal length of a lens if its power is \( +2 \, \text{D} \)?