Eye structure, defects of vision, refraction through prism, dispersion, scattering.
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Q1 · Human Eye and Colourful World · EASY
A person can see distant objects clearly but cannot read a book held at normal reading distance. Which defect of vision does this person have and what type of lens should be used to correct it?
Q2 · Human Eye and Colourful World · MEDIUM
A ray of white light passes through a glass prism and splits into its constituent colours. The violet colour deviates the most and red colour deviates the least. What is the correct explanation for this phenomenon?
Q3 · Human Eye and Colourful World · HARD
During sunrise and sunset, the sun appears reddish-orange, while at noon it appears white. A student wants to understand this using Rayleigh scattering principles. If the intensity of scattered light is inversely proportional to the fourth power of wavelength, and the wavelength of red light is 1.75 times that of blue light, approximately how many times more intensely is blue light scattered compared to red light?
Q4 · Human Eye and Colourful World · MEDIUM
A person suffering from myopia can see clearly up to 1.5 m. What type of lens and approximate power is needed to correct this defect to see distant objects clearly?
Q5 · Human Eye and Colourful World · EASY
A person suffering from myopia can see objects clearly only up to a distance of 2 m. What type of lens and of what power should be used to correct this defect?