When smoke contains very fine particles of ash, the _______________ lights get scattered, and the smoke looks milky blue.

The part which protects the human eye is called _________________.

 Nearsightedness is also known as _____________________.

Far point of a human eye is ___________________.

Which glasses or lens are used to correct the short sighted eye defect ?

In human eye _______________ helps in bending light

Long-sightedness is caused by the eyeball being too short. It can be corrected by the use of a ___________

Cylindrical lenses are used to cure ______________.

Which color of light has the minimum wavelength?

Assertion (A) : A rainbow is formed when white light is incident on raindrops.

Reason (R) : White lights contains seven colours and it undergoes dispersion inside a raindrop.