Emitting & absorbing EM radiation (Edexcel GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is intensity in terms of EM radiation?
What is intensity in terms of EM radiation?
Amount of power per unit area
What do all objects constantly do with EM radiation?
What do all objects constantly do with EM radiation?
Emit and absorb it
What determines the distribution and intensity of wavelengths an object emits?
What determines the distribution and intensity of wavelengths an object emits?
Its temperature
What happens to the peak wavelength as temperature rises?
What happens to the peak wavelength as temperature rises?
Shifts to shorter wavelengths
When does an object's temperature increase?
When does an object's temperature increase?
Absorbs more than it radiates
What condition maintains an object's constant temperature?
What condition maintains an object's constant temperature?
Radiates and absorbs same power
What happens to Earth's local temperature during the day?
What happens to Earth's local temperature during the day?
Increases due to absorption
What happens to Earth's local temperature at night?
What happens to Earth's local temperature at night?
Decreases due to emission
How does global warming occur according to radiation balance?
How does global warming occur according to radiation balance?
Atmosphere absorbs more than emits
Which surfaces are better emitters of radiation?
Which surfaces are better emitters of radiation?
Matte and black surfaces