An important difference between waves and classical particles is that a. waves cannot interfere. b. particles cannot interfere. c. waves can only interfere destructively. d. particles can only interfere destructively.

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g