Plane mirrors are used in making periscopes. They are placed at 45-degree angles to the line of sight, allowing light to be reflected from one mirror to another, enabling a person to see over or around obstacles by reflecting the ...
Tiwari Academy Discussion Latest Questions
The formation of bright colors in the thin lather of soap is the result of multiple reflection and interference. Light waves reflect off the different layers of the soap film, causing constructive and destructive interference, which produces the visible spectrum ...
Convex mirrors are used in automobiles to see the rear side traffic. They provide a wider field of view compared to plane mirrors, allowing drivers to see more area behind them. The convex shape makes objects appear smaller but covers ...
The power of sunglasses is typically measured in 0 diopters. Sunglasses are designed to block sunlight and reduce glare without altering the focus of light entering the eye, distinguishing them from corrective lenses used for vision correction.
The power of the lens with a focal length of 25 cm will be +4D. The power of a lens in diopters (D) is calculated as the reciprocal of the focal length in meters, so a focal length of 25 ...
The power of a convex lens with a focal length of 0.2 meters will be +5D. Power (in diopters) of a lens is calculated as the reciprocal of its focal length in meters, so a focal length of 0.2 meters ...
If the power of the lens of an eyeglass is +2 diopters, its focal length will be 50 cm. The focal length of a lens in meters is the reciprocal of its power in diopters.
When a convex lens is immersed in water, its focal length decreases. This is because the refractive index of water is higher than that of air, causing light to bend more sharply, effectively decreasing the lens’s ability to converge light ...
The division of different colors of light in a prism is called dispersion of light. This phenomenon occurs because different wavelengths of light refract at different angles as they pass through the prism, separating into a spectrum of colors from ...
The sun appearing red at sunset is not a result of atmospheric refraction. This phenomenon is caused by scattering. As sunlight passes through more of the Earth’s atmosphere at sunset, shorter wavelengths scatter out, leaving the longer red wavelengths to ...