Optics

Q2. Myopia can be corrected using a convex lens.

Q3. The focal length of a lens is related to its optical power.

Q4. The frequency of light changes when it refracts into another medium.

Q5. The sky appears red because blue light is scattered less.

Q6. The power of a convex lens is generally negative.

Q7. Optical fibre works on the principle of total internal reflection.

Q8. The unit of lens power is dioptre.

Q9. The frequency of light remains unchanged when it passes from one medium to another.

Q10. Light travels faster in a medium with higher refractive index.