How can you optimize your physical health?
a. healthy diet, adequate sleep, and cosmetic surgery
b. cosmetic surgery, perfectly straight teeth, and tanned skin
c. good physical fitness, disease-free, adequate sleep, and healthy diet
d. good physical fitness, disease-free, cosmetic surgery, and healthy diet

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.