The Photoelectric Effect Lab 10 Prelab Questions : Predictions If the light shining on the metal...

The Photoelectric Effect Lab 10

Prelab Questions : Predictions

If the light shining on the metal becomes brighter, will the kinetic energy of the emitted electrons increase?

If the light shining on the metal becomes brighter, will the number of electrons being emitted per second (the photo-current) increase?

If the frequency of the light shining on the metal is increased, will the number of electrons being emitted per second (the photo-current) increase?

If the frequency of the light shining on the metal is increased, will the kinetic energy of electrons being emitted increase?

Will all colors (frequencies) of light cause electrons to be emitted by the metal? What is the condition on wavelength for Potassium that light should cause electrons to be ejected?

If light with the same frequency and same power shines on two different metals with different work functions, will both metals emit electrons?
1. Will these electrons have the same kinetic energy?
2. Will the photo-current be larger for the metal with the smaller work function?

Expert Solution

✓If the light shining on the metal becomes brighter,the kinetic energy of the emitted electrons will not increase as kinetic energy is independent of the intensity of incident light.

✓If the light shining on the metal becomes brighter, the number of electrons being emitted per second (the photo-current) will increase as intensity of incident light is directly related to the number of electrons ejected .

✓ If the frequency of the light shining on the metal is increased, the number of electrons being emitted per second (the photo-current) will not increase as frequency and number of electrons ejected are independent of each other

✓If the frequency of the light shining on the metal is increased, the kinetic energy of electrons being emitted increase

No all colours will not cause the electrons to be emitted from metal because different colours have different wavelengths and thus different energies . Only the colours having energy greater than the work function of metal will cause the electrons to eject

genius_generous answered 7 months ago

A photoelectric experiment was performed by separately shining a laser at 450 nm (blue light) and...

A photoelectric experiment was performed by separately shining a laser at 450 nm (blue light) and a laser at 560 nm (yellow light) on a clean metal surface and measuring the number and kinetic energy of the ejected electrons. Which light would generate more electrons? Which light would eject electrons with greater kinetic energy? Assume that the same number of photons is delivered to the metal surface by each laser and that the frequencies of the laser lights exceed the...

In an experiment on the photoelectric effect, a beam of monochromatic light is aimed at a...

In an experiment on the photoelectric effect, a beam of monochromatic light is aimed at a nickel-plated cathode. A scientist uses mathematical formulas to calculate the maximum speed of the electrons that the cathode releases. Which constant most limits the precision of the calculation? the charge of one electron the mass of an electron the work function of nickel Planck’s constant Which example illustrates a behavior called “photoconductivity”? A metallic film conducts electricity when an electric potential is applied across...

We are shining a red light on a totally different metal, and are ejecting photo electrons...

We are shining a red light on a totally different metal, and are ejecting photo electrons with a small KE of 1.5 eV. We are going to make predictions about what happens when we shine light of a greater intensity red light on the same sample. Identify what classical (wave) theory of light incorrectly predicts we would observe. Contrast that with the result which the Quantum Model correctly predicts. I am looking for several solid details.

The photoelectric effect is the emission of electrons from the surface of a conductor when light...

The photoelectric effect is the emission of electrons from the surface of a conductor when light strikes it. Several important features of the photoelectric effect cannot be explained by the classical theory of electromagnetic waves. Briefly explain this phenomenon in terms of intensity, frequency, kinetic energy, and the number of photoelectrons.

how did the photoelectric effect prove that light had particle properties?

When 210 nm light falls on a metal, the current through a photoelectric circuit is brought...

When 210 nm light falls on a metal, the current through a photoelectric circuit is brought to zero at a stopping voltage of 1.54 V . What is the work function of the metal? Express your answer using three significant figures.

A student was performing an experiment to demonstrate the photoelectric effect. When the student shined light...

A student was performing an experiment to demonstrate the photoelectric effect. When the student shined light from the source on the metal surface, no electrons were ejected. Which of the following could explain the observed result? Select one: a. The light intensity was insufficient. b. The energy of the light was too high. c. The frequency of the light was too low. d. The wavelength of the light was too short.

Prelab Questions 1. Once digested, what are 2 methods of measuring the content of a metal...

Prelab Questions 1. Once digested, what are 2 methods of measuring the content of a metal in solution? 2. In what cases would microwave digestion be unnecessary for a solid sample? 3. Why is microwave digestion inappropriate for organic analytes? 4. If a material sample claims zinc content of 6 mg Zn per 30 g sample, what is the resulting concentration in ppm if 0.825 g are digested and diluted in 100 mL of water?

Can someone explain how the photoelectric effect is implemented when analyzing a sample in the lab?

In the photoelectric effect experiment, a light photon with a wavelength λ=525 nm hits a metallic...

In the photoelectric effect experiment, a light photon with a wavelength λ=525 nm hits a metallic cesium (work function = 3.43 ×10−34 J).\ What is the kinetic energy of the photoelectron produced?

Question