Optics

Q2. A convex lens converges parallel light rays.

Q3. A concave lens is thicker at the centre than at the edges.

Q4. Reflection is the return of light into the same medium after striking a surface.

Q5. Myopia can be corrected using a convex lens.

Q6. A prism can disperse white light into colours.

Q7. Hypermetropia can be corrected using a convex lens.

Q8. The unit of lens power is dioptre.

Q9. The frequency of light changes when it refracts into another medium.

Q10. The focal length of a lens is related to its optical power.