How do you calculate the magnification of an image?

Which statement correctly describes the relationship between frequency and wavelength?

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

Which accurately compares concave and convex lenses?