Smriti is looking at herself in a convex mirror in a science museum, standing away from the mirror. Her image appears to be around half her actual height. Estimate the focal length of the mirror.
Important Questions on Light - Reflection and Refraction
A lens made of material with a refractive index is immersed in a liquid with a refractive index . The diagram below shows two rays incident on the lens when it is immersed in the liquid.
Copy the diagram and draw the light rays after they pass through the lens. Justify your diagram.
The image below shows the refraction of light in three transparent rectangular blocks, X, Y and Z, made of different materials when they are placed in air. The angle of incidence is different in each case but the angle of refraction is the same in all three blocks.
Compare the speed of light in the three blocks. Justify your answer.
Four students A, B, C and D performed an experiment to determine the focal length of a concave mirror by using a lighted candle kept at a considerable distance as the object. They represented the position of image by drawing the following diagrams:
Which diagram describes the correct position of the image of the candle?
