Before setting, the Sun appears elliptical due to the atmospheric refraction. When close to the horizon, the Sun’s light passes through a thicker layer of Earth’s atmosphere, causing it to bend slightly. This refraction effect makes the Sun appear distorted ...
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The spectacles used for a person suffering from nearsightedness (myopia) are concave lenses. Concave lenses are thinner at the center and thicker at the edges, diverging light rays entering the eye. This helps move the focal point backward onto the ...
Primary colors are those colors which cannot be produced by mixing other colors. They are fundamental and serve as the basis for creating other colors through combination. In the context of light, the primary colors are red, green, and blue. ...
The color of an opaque object is due to the color which it absorbs. When light strikes an opaque object, certain wavelengths (colors) of light are absorbed by the object’s surface material. The remaining wavelengths are reflected or scattered, giving ...
Without an atmosphere, the sky visible from Earth would appear black. This is because the scattering of sunlight by atmospheric gases, which causes the blue color of the sky, would not occur in the absence of an atmosphere.
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 ...
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 ...
A diverging lens is one that spreads rays of light. It is thinner at the center than at the edges, causing parallel rays of light passing through it to diverge away from a focal point, where the virtual image is ...
Diffusion of light in the atmosphere occurs primarily due to the presence of dust particles. These microscopic particles scatter sunlight as it passes through the atmosphere, causing the sky to appear blue during the day and red or orange during ...
The rainbow displays a continuous spectrum of colors. It typically shows seven distinct colors: red, orange, yellow, green, blue, indigo, and violet. This sequence of colors is formed due to the dispersion and refraction of sunlight through water droplets in ...