Physics, 02.10.2019 02:00 wirchakethan23

Choose the answer that explains the photoelectric effect.

metallic plates emit protons only when light of a certain minimum frequency shines on them.
metallic plates emit electrons when the cumulative effect of light causes electron movement.
metallic plates emit electrons only when light of a certain maximum frequency accumulates energy.
metallic plates emit electrons only when light of a certain minimum frequency shines on them.

taylor's experiment:

accurately measured the speed of light
locked together the phases of two light sources so that the interference pattern would not shift
showed that man's reaction time was much slower than the speed of light
showed that individual photons have wave characteristics

Answers: 2

Show answers

Another question on Physics

Physics, 22.06.2019 01:00

An object is 10. cm from the mirror, its height is 3.0 cm, and the focal length is 2.0 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1.33 -1.33 +0.75 -0.75

Answers: 2

Answer

Physics, 22.06.2019 11:20

If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant

Answers: 3

Answer

Physics, 22.06.2019 18:00

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.

Answers: 1

Answer

Physics, 23.06.2019 02:30

Asatellite with an orbital period of exactly 24.0 h is always positioned over the same spot on earth. this is known as a geosynchronous orbit. television,communication, and weather satellites use geosynchronous orbits. at what distance would a satellite have to orbit earth in order to have a geosynchronous orbit?

Answers: 2

Answer

You know the right answer?

Choose the answer that explains the photoelectric effect.

metallic plates emit protons o...

Questions