What is the longest wavelength of light

Reference no: EM13319029

In a photoelectric effect experiment, a metal sample is illuminated by 10.0 mW of ultraviolet light of wavelength 240 nm. It is observed that 250,000 photoelectrons are ejected from the metal each second, with kinetic energies from zero to 2.20 eV.

1. What is the work function of this metal, in eV?

2. What is the longest wavelength of light that can knock electrons out of this metal?

Reference no: EM13319029

Questions Cloud

Find the resultant couple moment acting on the beam : (a). Find the sum of moments about point E due to this system of forces (b). Find the sum of moments about point A due to this system of forces (c). Find the resultant couple moment acting on the beam

Calculate the pressure due to the ocean at the bottom : The greatest ocean depths on the Earth are found in the Marianas Trench near the Philippines. Calculate the pressure due to the ocean at the bottom of this trench

Why do you want to proceed with project : Why do you want to proceed with this project? What research do you have to support your project and who will be assisted? Who is the target group, the demographic?

Explain what is the volume in m3 of a single aluminum atom : How many aluminum atoms would have to be placed side by side to span a distance of 6.0 µm atoms (c) If the atom is assumed to be a sphere, what is the volume in m3 of a single aluminum atom

What is the longest wavelength of light : In a photoelectric effect experiment, a metal sample is illuminated by 10.0 mW of ultraviolet light of wavelength 240 nm. What is the longest wavelength of light that can knock electrons out of this metal

Write equilibrium equations in the x-y and z directions : The traffic light shown in Figure 3 is supported by a system of cables. Points A and B are in a vertical plane which is parallel to x-z plane. Point C is in y-z plane. The traffic light has a mass of 75 kg.

Find is the force attractive or repulsive : Two very small spheres are initially neutral and separated by a distance of 0.55 m. find Is the force attractive or repulsive

Compute the internal resistance of the battery : A battery having an emf of 9.80 V delivers 109 mA when connected to a 60.0 load. Determine the internal resistance of the battery

Compute the disclosure and elevation of a : Reciprocal leveling gives the following readings in feet from a setup near A: on A, 2.071; on B, 8.254, 8.259 and 8.257. At the setup near B: on B, 9.112; on A, 2.926, 2.930 and 2.927.

User Account

All Pages