Blackbody Radiation and Quantum Energy

Blackbody Radiation and Quantum Energy

Assessment

Interactive Video

Physics, Science, Mathematics

10th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video explains blackbody radiation, demonstrating how heating a blackbody changes its color and emits light. It discusses the ultraviolet catastrophe, where classical physics predicted incorrect light emission at high temperatures. Planck's quantization theory resolved this by suggesting energy levels are discrete. Einstein further explained this with quantized energy levels in atoms. The video concludes with a summary of these concepts.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary characteristic of a blackbody radiator at room temperature?

It remains transparent.

It reflects all radiation.

It emits visible light.

It absorbs all radiation.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to a blackbody radiator as it is heated to 750 degrees Celsius?

It becomes transparent.

It remains black.

It starts to emit ultraviolet light.

It turns from black to dark red and then to bright red.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is a theoretical black body constructed in the video?

Using a transparent box with a hole.

Using a glass tube.

Using a box with a hole painted black inside.

Using a metal sphere.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the relationship between the intensity of light and energy?

Intensity is the energy per minute per area.

Intensity decreases as energy increases.

Intensity is the energy per second per area.

Intensity is unrelated to energy.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the 'ultraviolet catastrophe'?

The prediction that black bodies emit only visible light.

The prediction that black bodies emit only infrared light.

The prediction that black bodies emit excessive ultraviolet light.

The prediction that black bodies emit no light.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What did Planck propose to resolve the ultraviolet catastrophe?

Energy levels are quantized.

Energy levels are continuous.

Energy levels are infinite.

Energy levels are random.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to Planck, what is energy proportional to?

The temperature of the black body.

An integer times Planck's constant times frequency.

The speed of light.

The square of the frequency.

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