A lamp emits light of 400 nm wavelength. When the light strikes a metal surface, a stream of electrons emerges from the metal. If the frequency of the light striking the surface is doubled which of the following statements is true?

Q: An Electron is emitted by heating a cathode and is accelerated by the potential difference between…

A: Given- Voltage V= 800 V  If v is the velocity gained by electron when accelerated under a potential…

Q: With what kinetic energy, in eV , must a proton be launched from the negative plate if it is just…

A: Separation, d = 4.7 mnVoltage, ∆V = 78 VCharge on proton, Q = 1.6×10-19 C = 1eEnergy in eV, KE = ?

Q: (10%) Problem 4: Consider the parallel-plate capacitor shown in the figure. The plate separation is…

A: Given data: Separation distance d=5.5mm=5.5×10-3m Electric field  E= 29 N/C

Q: Part A What is the strengih of the electric tield at the position indicated by the dot in the igure?…

A: Solution: Give that q1 = q2 = 3nc = 3x10-9 C r = 3.8 cm = 0.038 m

Q: a. Calculate the electric force and gravitational force between the proton and the electron for a…

A:

Q: Of the following quantities, which one has dimension different from the remaining three? (a) Energy…

A:

Q: Rank in order the change AU of an electron as it moves from i to f? a) b) Ob<a=d<c Ob<a<d<c Oc<a<b<d…

A:

Q: 2 110 60. R =R. R=2016-1 11 30. 113. b) 5 V d E1. 6 A 239 40 ww (+) - 20 Y 201 g WW 4 h 5). A…

A:

Q: On which level within this parallel status would an electron have the most potential energy? (the…

A: An electron have the most potential Energy at level D .

Q: The effect of magnetic fields on the electron, If the electron has been accelerated from rest…

A: Option d

Q: Use the following half-life graph to answer the question: Mass Remaining (mg) 60.0 50.0 40.0 30.0…

A: The half-life of a radioactive isotope is the amount of time it takes for one-half of the…

Q: 1 eV – is the energy, which an particle with elementary charge gets going through 1V voltage. Find…

A: The objective of the question is to find the relation between energy in electronvolts (eV) and…

Atomic Number

Elements are the building blocks of all the matter that exist in the universe. Every element is made up of atoms that have protons, electrons, and a nucleus. In order to know the difference between the elements, an atomic number is used. Every element has its own individual atomic number. The atomic number is a single most important characteristic of an atom.