Aperson with poor eyesight can see clearly objects with his unaided eye as close as 10.0 cm and as far away as 78.4 cm. the person decides to get glasses to correct his vision. the lenses of the glasses sit a distance of 2.0 cm from his eye. what power lens (in diopters) is required to correct this person's distance vision?

show the wavelengths of a wave. show the crests of a wave.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

so easy. just google the electromagnetic waves and it’ll pop up.