When light from one source, x, strikes a metal, electrons are ejected. when light from another source, y, strikes the same metal, electrons are not ejected. which best explains why this occurs? light from source x has a higher intensity than light from source y. light from source x has a lower intensity than light from source y. photons of light from source x carry more energy than photons of light from source y. photons of light from source x carry less energy than photons of light from source y.

Photons of light from source X carry more energy than photons of light from source Y

Explanation: This is based on the fact that light is a electromagnetic radiation. When a photon hits an electron on a metal surface, the electron can be emitted. The emitted electrons are called photoelectrons.

E= energy

h= Planck's constant

= frequency of incident radiation

= threshold frequency

In order to eject an electron, the incident radiation must possess frequency greater than threshold frequency and a light with higher frequency has higher energy. Thus higher energy radiation can easily eject electrons.

Thus we can conclude Photons of light from source X carry more energy than photons of light from source Y

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .