How is the number 15,000 written in scientific notation

1.5 x 10^4

Explanation:

The general definition of it is n which is a value between 1 and 10 times  10^y   which y is positive for a value greater than 1 and negative for a value smaller than 1. Both ways, y is equal to the magnitude of 10 present in the number. (LMK)

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.