3. Draw a ray diagram to show the image
formed by a convex lens when the object is
placed between
F and 2F.
4. Define dispersion of light
5. State Rayleigh's law of scattering
6. Differentiate convex lens and concave lens.
Answers
3.Pictures down
4.The phenomenon of splitting of white light in two its components colours on passing through a transparent medium like a glass prism, is called dispersion of light.
5.Rayleigh's scattering law. (Also called Rayleigh scattering.) An approximate law of scattering of electromagnetic waves by molecules and particles small compared with the wavelength of the illumination at wavelengths for which absorption is sufficiently small.
6.Convex lens
Structure-A convex lens is thicker in the middle and thinner at the edges
Action-It is a converging lens
Image-The image formed may be real/enlarged
Concave lens
Structure-A concave lens is thinner in the middle and thicker at the edges
Action-It is a diverging lens
Image-The image formed is always virtual and erect
