Is light a wave or a particle quizlet?
Light behaves as a wave – it undergoes reflection, refraction, and diffraction just like any wave would. Yet there is still more reason to believe in the wavelike nature of light. Continue with Lesson 1 to learn about more behaviors that could never be explained by a strictly particle-view of light.
What is the correct definition of a light year?
1 : a unit of length in astronomy equal to the distance that light travels in one year in a vacuum or about 5.88 trillion miles (9.46 trillion kilometers)
What is the correct definition of a light year quizlet?
Light Year. A unit that equals the distance light travels through space in one year; a way to measure extremely vast distances; it equals 9.46 trillion kilometers or 9.49 x 1012 km.
Is light a particle or a wave defend your answer?
In an approximate way, light is both a particle and a wave. But in an exact representation, light is neither a particle nor a wave, but is something more complex.
What is it called when light travels in a straight line?
In all of these cases, light is modeled as traveling in straight lines called rays. The word ray comes from mathematics and here means a straight line that originates at some point. It is acceptable to visualize light rays as laser rays (or even science fiction depictions of ray guns).
How can we prove that light travels in a straight line?
Two experiments are used to demonstrate how light travels in straight lines. In the first example, the presenter arranges three pieces of card, with holes in, in an uneven line. The light stops and cannot travel through all three cards. When she arranges the holes in a straight line, the light can travel through.
What travels in a straight line?
Light travels in a straight line can be observed by keeping an object in the path of light. In an atmosphere which is bit dusty, we can see light traveling in a straight line. Light emerging from the torch, train and lamps always travel in a straight line.
Does light travel the shortest path?
Light does travel on the path which would take the shortest time to travel between two points. If you generalize this principle for electromagnetism you will find that the light propagates on the path on which it takes the least time to travel between two points.
Why does light take the path of least time?
Physicist: Light travels at different speeds in different materials. When you shine a beam of light from one material into another (like from air to water) it bends in such a way that the path it takes from one point to another requires the least possible time.
What is the path of light?
The path of light is straight and the velocity of light is constant in uniform composition material such as glass. The path and the velocity of light changes when light enters another material such as air or water. The path and velocity of light changes at the boundary, or interface, between two materials.