<span>1079252848.8 kilometer per hour
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1. Light Travelling from denser medium to less dense medium
2. Light Travelling from less dense medium to denser medium
Lucite has a refractive index of n=1.50. This means that the speed of the light in lucite is decreased according to:

where

is the speed of light in air. Putting the number in the formula, we find that the speed of light in lucite is

The frequency of the light is

, so now we can calculate the wavelength in lucite by using the formula:

<span>Therefore, the correct answer is (2) 393 nm.</span>
Answer:
(This can be a way to think about it) Nicholas Mikolaj Kopernik,1473–1543 Polish astronomer who declared the now accepted theory that the Earth and the other planets move around the Sun aka the Copernican System.
Explanation:
Answer is Heat always flows from a Higher place to a lower place.
If my answer is wrong then I'm sorry!
I hope it's helpful!!