A photon has 8.0 x 10-15 J of energy. Planck's constant is 6.63 x 10-34 J•s.
What is the frequency of the photon?
O 1.21 x 1019 Hz
O 8.3 x 10-20 Hz
O 1.21 x 10-19 Hz
O 8.3 x 1020 Hz

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive