Red light being of longest wavelength scatters least and reaches our eye while blue colour scatters most.

When pesticides and other non-biodegradable chemicals enter the food chain, these get accumulated progressively at each trophic level and this is known as biological magnification.

The sky appears blue due to excessive scattering of blue light by the air molecules.

When a beam of light passes from a denser medium to a rarer medium, its velocity increases and wavelength decreases, per frequency remains constant.

The white solid, lead carbonate is heated and decomposes into yellow coloured lead oxide and carbon dioxide. So, “X” is lead oxide.

Distance, odometer is an instrument used for measuring the distance travelled by a vehicle such as a bicycle or car.

The displacement of an object can be less than or equal to the distance covered by the object because the magnitude of the displacement is not equal to the distance. This can happen if the motion is along a straight ...