The red color in the sky at sunrise and sunset is caused by scattering. As the sun is low on the horizon, sunlight passes through more of the Earth’s atmosphere. Shorter wavelengths (blue and violet) scatter out, leaving the longer ...
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In a rainbow, purple is dispersed more. The dispersion of light occurs due to the varying wavelengths of different colors, with shorter wavelengths like purple bending more than longer wavelengths like red. This results in purple being more spread out ...
The stars appear higher in the sky than they actually are due to atmospheric refraction. As starlight enters the Earth’s atmosphere, it bends towards the normal because the atmosphere’s density increases closer to the surface. This bending makes the stars ...
Dry sand appears bright because it reflects more light, while wet sand appears darker because water fills the gaps between sand grains, reducing the reflection and causing more light to be absorbed or refracted within the sand-water mixture, making it ...
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 ...
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 ...