![Page 1: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/1.jpg)
5.1 – Light and Quantized Energy – Part 1
• OBJECTIVES: Students will be able to (SWBAT)
1. Predict the changes in wavelength and frequency based
on direct or indirect relationships
2. Describe the different forms of electromagnetic
radiation of the electromagnetic spectrum in terms of
2. Describe the different forms of electromagnetic
radiation of the electromagnetic spectrum in terms of
wavelength and frequency
• 8 lecture/10 reading questions
• 5-sentence summary
![Page 2: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/2.jpg)
Notes: 5.1 – Light and Quantized
Energy – Part 1
![Page 3: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/3.jpg)
Nuclear Atomic Model was Incomplete
• Rutherford’s model does not answer:
– why different elements have such different physical and
chemical properties
– how electrons behave and are arranged in an atom
• So scientists looked at the types of visible light • So scientists looked at the types of visible light
emitted from different elements and chemicals
– Helped them to understand the behavior of electrons
and their arrangement in atoms
![Page 4: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/4.jpg)
Light travels in waves
• All energy travels in waves
• Energy in wave form � electromagnetic
radiation
![Page 5: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/5.jpg)
Characteristics of a Wave
• WAVELENGTH (λ – Greek symbol lambda) – distance
from top to top (or bottom to bottom) of a wave
(units is meters (m) or nanometers (nm)wavelength
![Page 6: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/6.jpg)
Highest part
of wave
Length of wave from crest to crest (or trough to
trough)
Amplitude
Height of wave
Lowest part
of wave
![Page 7: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/7.jpg)
Converting from nm � m
• Attach “×10-9 m” to any value that is in nm
• Don’t worry about proper scientific notation form
• For example,• For example,
– 8.9 nm � m
– 24.3 nm � m
– 571 nm �m
8.9×10-9 m
24.3×10-9 m
571×10-9 m
![Page 8: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/8.jpg)
Characteristics of a Wave
• FREQUENCY (ν – Greek symbol nu) – how frequently
the waves passes a fixed point
– Units is 1 cycle per second or 1
s
– All units of frequency:
= s-1 = hertz (Hz)
– Megahertz (MHz) is used also
s
1
s
![Page 9: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/9.jpg)
Converting from MHz � Hz
• Attach “×106 Hz” to any value that is in MHz
• For example,
– 7.8 MHz � Hz 7.8×106 Hz– 7.8 MHz � Hz
– 90.4 MHz � Hz
– 162 MHz �Hz
7.8×106 Hz
90.4×106 Hz
162×106 Hz
![Page 10: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/10.jpg)
![Page 11: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/11.jpg)
Inverse or indirect Relationship
• Indirect or inverse proportional relationship
– As one value goes up, the other value goes down
(and vice versa)
• Wavelength and frequency have an indirect • Wavelength and frequency have an indirect
proportional relationship
– Wavelength ↑, frequency ↓ (λ ↑, ν ↓)
– Wavelength ↓, frequency ↑ (λ ↓, ν ↑)
![Page 12: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/12.jpg)
![Page 13: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/13.jpg)
![Page 14: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/14.jpg)
Proportional Relationships
• Direct or directly proportional
– X ↑, Y ↑ (and X ↓, Y ↓)
• Inverse or indirectly proportional
– X ↑, Y ↓ (and X ↓, Y ↑)
• Wavelength and frequency have an indirectly • Wavelength and frequency have an indirectly
proportional relationship
– λ ↑, ν ↓
– λ ↓, ν ↑
![Page 15: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/15.jpg)
Longest wavelength,
lowest frequency
↓
shortest wavelength,
highest frequency
↓
![Page 16: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/16.jpg)
Electromagnetic Spectrum
• Electromagnetic spectrum (EMS) contains all types
of electromagnetic radiation
![Page 17: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/17.jpg)
![Page 18: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/18.jpg)
Radio Waves
• Longest wavelengths, lowest frequencies
• Radio, television and cell phone signals are sent
through radio waves
• Due to their very long wavelengths, often interfere
with other EMR’s (usually asked to shut off with other EMR’s (usually asked to shut off
equipment when other EMR’s are used…like in
planes and doctor’s office)
![Page 19: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/19.jpg)
Microwaves
• Higher frequencies (than radio waves) allow uses
for cooking, radar, telecommunications and cell
phones
![Page 20: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/20.jpg)
Infrared Waves
• Infrared waves are given off from a heat source and
allows for thermal imaging (heat-vision or night-
vision goggles)
• Some animals, like snakes, can sense infrared waves
![Page 21: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/21.jpg)
Visible Light Waves
• Visible light waves come from light sources that
humans and other animals can detect
• Allows us to see various colors
• White light is a combination of all colors of the
visibile light spectrumvisibile light spectrum
![Page 22: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/22.jpg)
Colors of Visible Light
![Page 23: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/23.jpg)
Ultraviolet Waves
• The Sun, along with other types of EMR, emits
ultraviolet, or UV, waves
• Are harmful to humans in that they cannot be
blocked by human skin
• Can cause sunburns and skin cancer• Can cause sunburns and skin cancer
![Page 24: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/24.jpg)
X-Rays
• Powerful x-rays can penetrate many surfaces such
as human skin to take photos of bones and
skeletons
• Also used in security measures such as at the
airportairport
![Page 25: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/25.jpg)
Gamma Rays
• Most powerful waves of the EMS (highest
frequency, smallest wavelength)
• Result of many nuclear reactions and cosmic
(stellar) explosions
![Page 26: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/26.jpg)
White Light
• White light is composed of a continuous spectrum
of colors from the visible spectrum within the EMS
– R.O.Y.G.B.I.V.: red, orange, yellow, green, blue, indigo,
violet
• Can be separated by bending, or refracting• Can be separated by bending, or refracting
![Page 27: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/27.jpg)
What type(s) of electromagnetic
radiation do we get from the Sun?
![Page 28: 5.1 –Light and Quantized Energy –Part 1 - Weeblyjohwang.weebly.com/.../1/0/...light_and_quantized_energy_-_part_1.pdf · 5.1 –Light and Quantized Energy ... –Helped them to](https://reader031.vdocuments.mx/reader031/viewer/2022022011/5b0e39247f8b9aa31f8bbcc3/html5/thumbnails/28.jpg)
What type(s) of electromagnetic
radiation do we get from the Sun?