Light is described as having a dual wave-particle nature. Which piece of evidence provides support for the model of light as a particle? Young's double slit experiment showed that light waves show interference.
Light reflects when it hits a surface.
Light refracts when it moves from one medium to another.
Light does not need a medium to travel.

Hey

Your answer would be D (Light does not need a medium to travel.)

For a long time, people believed in what was called the aether. The aether was a medium in empty space which light would have traveled through. The reason why people thought this was that they didn't think it was possible for a wave (light) to travel in empty space. Of course, now we know that light is unusual in the sense that it doesn't require a medium because all other known types of waves do have mediums.

I wrote all that^, please read it if you want to know the reason why its d.

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles