How many light years are in 1 second?

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

Which of the following is not am example of a polymer? protein nylon kevlar concreta

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.