True or False. If false correct it. 1. light does not travel along a straight line. 2. All coloured light has same wavelenth.3. In refraction incident ray, refracted ray and normal lie in the same plane. 4. Velocity of light is greater in rarer medium is greater than that in denser medium. 5. For red colour angle of refraction is the least. 6. The refractive index of a medium is independent of wavelength. 7. Tyndall scattering, is the scattering of light by colloids. 8. According to Rayleigh’s scattering law, red colour is scattered to a greater extent than blue colour. 9. Mie scattering takes place when the diameter is larger than the wavelength of the incident light. 10. The lines in Raman scattering having frequencies lower than the incident frequency are called Antistoke’s lines. 11. In front of a convex lens when the object is placed at infinity the formed image is smaller than that of the object. 12. When an object is placed at finite distance from the concave lens a virtual image is formed between optical centre and focus of the concave lens. 13. Pupil of human eye bends the incident light on to the lens. 14. For a normal human eye, the value of far point is 25 cm. 15. Astigmatism is corrected by cylindrical lenses.