Which equation was used by Albert Einstein to explain the photoelectric effect? [tex]$[E=$[/tex] energy, [tex]$h=$[/tex] Planck's constant, and [tex]$v$[/tex] = frequency.]
A. [tex]$E=\frac{h}{v}$[/tex].
B. [tex]$E=h v$[/tex]
C. [tex]$E=\frac{\nu}{h}$[/tex]
D. [tex]$E=h-v$[/tex]
Answer (1)
The problem asks for the equation used by Einstein to explain the photoelectric effect.
The equation relates energy E , Planck's constant h , and frequency v .
The correct equation is E = h v .
Therefore, the answer is E = h v .
Explanation
Problem Analysis We are asked to identify the equation used by Albert Einstein to explain the photoelectric effect, given the variables E for energy, h for Planck's constant, and v for frequency.
Recalling the Equation The equation that relates energy ( E ), Planck's constant ( h ), and frequency ( v ) in the context of the photoelectric effect is: E = h v
Identifying the Correct Option Comparing this equation with the given options, we find that the correct equation is E = h v .
Final Answer Therefore, the equation used by Albert Einstein to explain the photoelectric effect is E = h v .
Examples
The photoelectric effect, explained by Einstein using the equation E = h v , has practical applications in solar cells. Solar cells convert light into electricity, where photons with sufficient energy (determined by their frequency v and Planck's constant h ) can knock electrons loose from a material, creating an electric current. This principle is also used in light sensors and digital cameras, where the energy of incoming light is measured to capture images or detect light levels. Understanding this equation helps us design and improve technologies that rely on the interaction between light and matter.
