11 The frequency of the monochromatic light produced by a laser is 4.7 x 10-14 Hz.
A ray of light from the laser passes from a vacuum, where the speed of light is 3.0 x 108 m/
S,
into a fibre-optic cable.
(a) State
(i) what is meant by monochromatic
*
(2 Points)
(ii) the frequency (1)
Enter your answer

Monochromatic means a single colour (single frequency).
The frequency is 4.7 x 10^14 Hertz

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.

It may possibly be c i think |-/