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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

To determine the Planck's constant from kinetic energy versus frequency graph

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Beginner

Intermediate

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Which of the following physical phenomenon is central to the experiment for finding Planck's constant using LEDs?

a: The photoelectric effect. Explanation

Explanation

b: Electromagnetic induction. Explanation

Explanation

c: Diffraction of light. Explanation

Explanation

d: Nuclear fission. Explanation

Explanation

In the experiment with LEDs, what is the purpose of varying the voltage applied to the photocell?

a: To control the color of the LED light. Explanation

Explanation

b: To change the intensity of the LED light. Explanation

Explanation

c: To adjust the wavelength of the LED light. Explanation

Explanation

d: To measure the energy of the emitted electrons. Explanation

Explanation

Why is it essential to use monochromatic light from LEDs in the experiment?

a: To increase the intensity of the emitted light. Explanation

Explanation

b: To reduce the energy consumption of the experiment. Explanation

Explanation

c: To minimize interference from ambient light sources. Explanation

Explanation

d: To prevent damage to the photocell. Explanation

Explanation

Which of the following scientists proposed the theory of quantized energy?

a: Max Planck Explanation

Explanation

b: Albert Einstein Explanation

Explanation

c: Niels Bohr Explanation

Explanation

d: Erwin Schrödinger Explanation

Explanation

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