6. what's a stalactite? a. poisonous mass found in caves that is formed by polluted water b. mound-shaped stone shaped by weathering c. large mound of dirt created by erosion d. dripstone produced by a buildup of minerals precipitated from groundwater

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.