An object is placed in front of a lens which forms an image of the object.
a) if the lens is convex, the image cannot be virtual.
b) if the image is real, then it is also inverted.
c) if the image is real, then it is also upright.
d) if the image is virtual, the lens must be a diverging lens.
e) if the image is virtual, then it is also inverted.

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.