The sky appears blue mainly due to:
Selective scattering of shorter wavelengths
Sunlight entering the atmosphere is scattered by gas molecules through Rayleigh scattering, which scatters shorter wavelengths such as blue and violet far more strongly than longer wavelengths like red and orange, roughly in proportion to the inverse fourth power of wavelength. Since human eyes are more sensitive to blue than violet, the sky appears predominantly blue.
Important Questions from Optics
Which one of the following colours may be obtained by combining green and red colours?
Which of the following are the primary colours of light?
Directions: The following items consist of two statements, Statement I and Statement II. You are to examine these two statements carefully and select the answers to these items using the code given below:
Statement I: Diamond is very bright.
Statement II: Diamond has very low refractive index
A non-SI unit called 'nit' is the unit of which of the following photometric quantities used to measure a multitude of light intensity?
Which among the following is used as a reflector in search lights?
