Name the part of the eye: a) Which controls the amount of light entering the eye, b) On which the image is formed. c) Which changes the focal length of the eye-lens
a) Iris b) Retina c) Ciliary muscles
The cornea and eye lens are the two components of the eye that bend light waves.
Human eyes contain convex lenses.
In the realm of academic excellence, there are certain individuals who leave an indelible mark on their journey. Ritika Kumari, a young and talented student, has emerged as a true inspiration and role model for aspiring scholars. Hailing from Dhanbad, a district known for its coal and mineral resources, Ritika has not only topped her …
In the realm of academic achievements, there are exceptional individuals who stand out from the crowd, inspiring others with their unwavering dedication and remarkable talents. Meet Ritika Kumari, a brilliant student who has soared to new heights in the district of Dhanbad, leaving an indelible mark in the realm of 12th Science exams. In this …
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During sunrise and sunset, light has to travel a longer distance to reach the observer. Loss of energy due to scattering is more for high-frequency waves. Longer wavelength wave has minimum loss due to scattering and can travel long distance. Red color has a longer wavelength, and its intensity reaches the observer more compared to …
The wavelength of red light is about 1.8 times that of blue light. As a result, when sunlight travels through the atmosphere, blue light (which has shorter wavelengths) is scattered by the air’s small particles more intensely than red light. Our eyes are exposed to the scattered blue light.
The wavelength of red light is around 1.8 times that of blue light. As a result, when sunlight travels through the atmosphere, blue light (which has shorter wavelengths) is scattered by the air’s small particles more intensely than red light. Our eyes are exposed to the scattered blue light.
Advanced sunrise and delayed sunset are phenomena caused due to atmospheric refraction. In this the Sun appears to rise early by 2 minutes and set late by 2 minutes. The diagram below shows this phenomenon. When the rays from the Sun hit the atmosphere they get refracted.
The refraction of starlight by the atmosphere is what causes the twinkling of the stars. Due to the several layers that make up the atmosphere and the constantly changing paths that light rays from the star take, refractive indices are always changing. As a result, the amount of rays entering, the eye’s pupil, and the …