Download presentation

Presentation is loading. Please wait.

Published byDallas Peavey Modified over 2 years ago

1
WHAT LAWS GOVERN THE QUANTITY AND TYPES OF ENERGY EMITTED BY AN OBJECT?

2
In particular: 1) The Sun, our source of energy. 2) The Earth, which must ultimately lose the energy it receives, or get warmer.

3
WHAT LAWS GOVERN THE QUANTITY AND TYPES OF ENERGY EMITTED BY AN OBJECT? In particular: 1) The Sun, our source of energy. 2) The Earth, which must ultimately lose the energy it receives, or get warmer. TWO BASIC QUESTIONS: 1)HOW MUCH ENERGY? 2)WHAT TYPE OF ENERGY?

4
How Much Energy? Stefan-Boltzman’s Law: Electromagnetic Radiation generated by the vibration of molecules of a substance. Average energy level (vibration) of the molecules in an object is determined by its temperature. Hotter objects - more vibration More vibration – more electromagnetic radiation Hot objects emit more radiation than cold objects.

5
How Much Energy? Stefan-Boltzman’s Law: Electromagnetic radiation generated by the vibration of molecules of a substance. Average energy level (vibration) of the molecules in an object is determined by its temperature. Hotter objects - more vibration More vibration – more electromagnetic radiation Hot objects emit more radiation than cold objects.

6
How Much Energy? Stefan-Boltzman’s Law: Electromagnetic radiation generated by the vibration of molecules of a substance. Average energy level (vibration) of the molecules in an object is determined by its temperature. Hotter objects - more vibration More vibration – more electromagnetic radiation Hot objects emit more radiation than cold objects.

7
How Much Energy? Stefan-Boltzman’s Law: Electromagnetic radiation generated by the vibration of molecules of a substance. Average energy level (vibration) of the molecules in an object is determined by its temperature. Hotter objects - more vibration More vibration – more electromagnetic radiation Hot objects emit more radiation than cold objects.

8
How Much Energy? Stefan-Boltzman’s Law: Electromagnetic radiation generated by the vibration of molecules of a substance. Average energy level (vibration) of the molecules in an object is determined by its temperature. Hotter objects - more vibration More vibration – more electromagnetic radiation Hot objects emit more radiation than cold objects.

9
How Much Energy? Stefan-Boltzman’s Law: Electromagnetic radiation generated by the vibration of molecules of a substance. Average energy level (vibration) of the molecules in an object is determined by its temperature. Hotter objects - more vibration More vibration – more electromagnetic radiation “Hot objects emit more radiation than cold objects.”

10
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant

11
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant

12
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant

13
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant

14
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant Hot objects emit a disproportionately large quantity of energy.

15
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant Hot objects emit a disproportionately large quantity of energy. 1x1x1x1 = 1 2x2x2x2 = 16 3x3x3x3 = 81

16
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant Hot objects emit a disproportionately large quantity of energy. 1x1x1x1 = 1 2x2x2x2 = 16 3x3x3x3 = 81 Δ Temp =1

17
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant Hot objects emit a disproportionately large quantity of energy. 1x1x1x1 = 1 2x2x2x2 = 16 3x3x3x3 = 81 Δ Temp =1 Δ Energy =15

18
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant Hot objects emit a disproportionately large quantity of energy. 1x1x1x1 = 1 2x2x2x2 = 16 3x3x3x3 = 81 Δ Temp =1 Δ Energy =15 Δ Temp =1

19
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant Hot objects emit a disproportionately large quantity of energy. 1x1x1x1 = 1 2x2x2x2 = 16 3x3x3x3 = 81 Δ Temp =1 Δ Energy =15 Δ Temp =1

20
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant Hot objects emit a disproportionately large quantity of energy. 1x1x1x1 = 1 2x2x2x2 = 16 3x3x3x3 = 81 Δ Temp =1 Δ Energy =15 Δ Temp =1 Δ Energy =65

21
How Much Energy? Stefan-Boltzman’s Law: E = d.T 4 E = Total energy emitted T = Surface temperature of the radiating object d = Stefan-Boltzman’s constant 5.86 x (Don’t need to remember!) Hot objects emit a disproportionately large quantity of energy. 1x1x1x1 = 1 2x2x2x2 = 16 3x3x3x3 = 81 Δ Temp =1 Δ Energy =15 Δ Temp =1 Δ Energy =65

22
What Type of Energy? Wein’s Law Electro-magnetic radiation is emitted in a wave form as the nucleii vibrate. Waves are characterized by the distance between two consecutive wave peaks, their “wavelength”. Hot objects have a greater average energy level in their molecules. They vibrate more frequently, so the distance (time) between peaks becomes shorter. Hot objects emit most of their energy at short wavelengths, cool ones emit it at longer wavelengths

23
What Type of Energy? Wein’s Law Electro-magnetic radiation is emitted in a wave form as the nucleii vibrate. Waves are characterized by the distance between two consecutive wave peaks, their “wavelength”. Hot objects have a greater average energy level in their molecules. They vibrate more frequently, so the distance (time) between peaks becomes shorter. Hot objects emit most of their energy at short wavelengths, cool ones emit it at longer wavelengths

24
What Type of Energy? Wein’s Law Electro-magnetic radiation is emitted in a wave form as the nucleii vibrate. Waves are characterized by the distance between two consecutive wave peaks, their “wavelength”. Hot objects have a greater average energy level in their molecules. They vibrate more frequently, so the distance (time) between peaks becomes shorter. Hot objects emit most of their energy at short wavelengths, cool ones emit it at longer wavelengths

25
What Type of Energy? Wein’s Law Electro-magnetic radiation is emitted in a wave form as the nucleii vibrate. Waves are characterized by the distance between two consecutive wave peaks, their “wavelength”. Hot objects have a greater average energy level in their molecules. They vibrate more frequently, so the distance (time) between peaks becomes shorter. Hot objects emit most of their energy at short wavelengths, cool ones emit it at longer wavelengths

26
What Type of Energy? Wein’s Law Electro-magnetic radiation is emitted in a wave form as the nucleii vibrate. Waves are characterized by the distance between two consecutive wave peaks, their “wavelength”. Hot objects have a greater average energy level in their molecules. They vibrate more frequently, so the distance (time) between peaks becomes shorter. Hot objects emit most of their energy at short wavelengths, cool ones emit it at longer wavelengths

27
What Type of Energy? Wein’s Law Electro-magnetic radiation is emitted in a wave form as the nucleii vibrate. Waves are characterized by the distance between two consecutive wave peaks, their “wavelength”. Hot objects have a greater average energy level in their molecules. They vibrate more frequently, so the distance (time) between peaks becomes shorter. Hot objects emit most of their energy at short wavelengths, cool ones emit it at longer wavelengths.

28
COOL MOLECULE

29
Wavelength

30
COOL MOLECULE Wavelength HOT MOLECULE

31
COOL MOLECULE Wavelength HOT MOLECULE

32
What Type of Energy? Wein’s Law: W max = T/2898 W max = Wavelength at which an object emits the maximum quantity of its energy, but not exclusively so. T = Surface temperature of the radiating object.

33
What Type of Energy? Wein’s Law: W max = 2898/T W max = Wavelength at which an object emits the maximum quantity of its energy, but not exclusively so. T = Surface temperature of the radiating object.

34
What Type of Energy? Wein’s Law: W max = 2898/T W max = Wavelength at which an object emits the maximum quantity of its energy, but not exclusively so. T = Surface temperature of the radiating object.

35
What Type of Energy? Wein’s Law: W max = 2898/T W max = Wavelength at which an object emits the maximum quantity of its energy, but not exclusively so. T = Surface temperature of the radiating object.

36
What Type of Energy? Wein’s Law: W max = 2898/T W max = Wavelength at which an object emits the maximum quantity of its energy, but not exclusively so. T = Surface temperature of the radiating object. T = 289.8

37
What Type of Energy? Wein’s Law: W max = 2898/T W max = Wavelength at which an object emits the maximum quantity of its energy, but not exclusively so. T = Surface temperature of the radiating object. T = 289.8W max = 2898/289.8 = 10.0μ

38
What Type of Energy? Wein’s Law: W max = 2898/T W max = Wavelength at which an object emits the maximum quantity of its energy, but not exclusively so. T = Surface temperature of the radiating object. T = T = 1499 W max = 2898/289.8 = 10.0μ

39
What Type of Energy? Wein’s Law: W max = 2898/T W max = Wavelength at which an object emits the maximum quantity of its energy, but not exclusively so. T = Surface temperature of the radiating object. T = T = 1499 W max = 2898/289.8 = 10.0μ W max = 2898/1499 = 2.0μ

40
SUN AND EARTH SurfaceEnergyW max Temp (Wm -2 )(μ) Sun Earth

41
SUN AND EARTH SurfaceEnergyW max Temp (Wm -2 )(μ) Sun6000 Earth 280

42
SUN AND EARTH SurfaceEnergyW max Temp (Wm -2 )(μ) Sun x10 6 Earth 280

43
SUN AND EARTH SurfaceEnergyW max Temp (Wm -2 )(μ) Sun x10 6 Earth

44
SUN AND EARTH SurfaceEnergyW max Temp (Wm -2 )(μ) Sun x Earth

45
SUN AND EARTH SurfaceEnergyW max Temp (Wm -2 )(μ) Sun x Earth

46
SUN AND EARTH SurfaceEnergyW max Temp (Wm -2 )(μ) Sun x Earth Short In

47
SUN AND EARTH SurfaceEnergyW max Temp (Wm -2 )(μ) Sun x Earth Short In Long out

48

49
Fahrenheit

50
Water Freezes 32°F

51
Water Boils 212°F Water Freezes 32°F

52
Water Boils 212°F All Molecules Cease Vibrating -465°F Water Freezes 32°F

53
Water Freezes 32°F Water Boils 212°F All Molecules Cease Vibrating -465°F Centigrade 0°C 100°C -273°C

54
Water Freezes 32°F Water Boils 212°F All Molecules Cease Vibrating -465°F 0°C 100°C -273°C 0°K KELVIN (Absolute) E = d. 0 4 = 0 : No temp, no vibration, no energy

55
Water Freezes 32°F Water Boils 212°F All Molecules Cease Vibrating -465°F 0°C 100°C -273°C 0°K KELVIN (Absolute) Centigrade increments

56
Water Freezes 32°F Water Boils 212°F All Molecules Cease Vibrating -465°F 0°C 100°C -273°C 0°K KELVIN (Absolute) Centigrade increments 273°K + 273

57
Water Freezes 32°F Water Boils 212°F All Molecules Cease Vibrating -465°F 0°C 100°C -273°C 0°K KELVIN (Absolute) Centigrade increments 273°K373°K +100

Similar presentations

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google