An object is placed 15.8 cm in front of a thin converging lens with an unknown focal length. if a real image forms behind the lens with an image distance of 4.2cm what is the focal length of the lens

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.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?