light waves and reflection

Question 1

what is light

Answer 1

wave produced by luminous objects which always travels in a straight line

Question 2

is it the water or light wave that need particles to travel

Answer 2

light waves

Question 3

speed of light in a vacuum equation

Answer 3

3 x 10 (to the power of 8) m/s

Question 4

______ is mostly a vacuum

Answer 4

space

Question 5

why does light travel fastest in a vacuum

Answer 5

vacuum = nothing so nothing will get in the way

Question 6

what do light waves reflect off

Answer 6

surfaces

Question 7

two types of reflection

Answer 7

specular reflection-all light waves reflect at the same angle along the surface
diffuse reflection-all light waves reflect in different directions along the surface

Question 8

angle of incidence is the same as angle of _______

Answer 8

reflection

Question 9

what is refraction

Answer 9

when a wave changes direction as it crosses a boundary between one medium and another

Question 10

what is a medium

Answer 10

substance that wave travels through