An individual is nearsighted; his near point is 18.0 cm and his far point is 40.0 cm.
(a) what lens power is needed to correct his nearsightedness?
-2.5diopters
(b) when the lenses are in use, what is this person's near

What type of nuclear decay causes the atomic number of an element to increase by 1?

Which is an example of an exothermic process?

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.