GCSE Physics - How Radiation Affects Temperature #72

The video explains how objects absorb and emit electromagnetic radiation, affecting their temperature. It introduces the concept of radiation intensity and how it can be graphed against wavelength. The video discusses how temperature changes affect the intensity and wavelength of emitted radiation, using examples like burning coal and the sun. It also covers the Earth's radiation balance, explaining how the planet absorbs and emits radiation, maintaining a relatively constant temperature.

What happens to an object when it absorbs more radiation than it emits?

• It warms up.

• It cools down.

• It changes color.

• It stays the same temperature.

What does the term 'intensity' refer to in the context of radiation?

• The color of the radiation.

• The power of radiation per unit area.

• The speed of radiation.

• The type of radiation.

Which type of radiation is not a focus in the graphing section?

• Infrared radiation

• Ultraviolet radiation

• Microwave radiation

• Visible light

How does the intensity of emitted wavelengths change as an object's temperature increases?

• Intensity remains constant.

• Intensity decreases for all wavelengths.

• Intensity increases for all wavelengths.

• Intensity decreases for short wavelengths.

Why do Bunsen burner flames change color as they get hotter?

• The flame emits less radiation.

• The flame absorbs more radiation.

• The flame emits longer wavelengths.

• The flame emits shorter wavelengths.

What role does the Earth's atmosphere play in radiation balance?

• It reflects, absorbs, and emits radiation.

• It only emits radiation.

• It only absorbs radiation.

• It has no effect on radiation.

What happens to the Earth's local temperature during the night?

• It remains constant.

• It fluctuates randomly.

• It decreases.

• It increases.