The nonreflective coating on a camera lens with an index of refraction of 1.23 is designed to minimize the reflection of 631-nm light. If the lens glass has an index of refraction of 1.52, what is the minimum thickness of the coating that will accomplish this task

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then to distribute the heat over the saucepan and to give heat to the water. the convection of the water distributing the heat within the water, till all the water is boiling

Two cars collide, lock bumpers and move together after the collision.this collision is known as perfectly inelastic collision.

Despite their crazy structure, human bones are surprisingly good!