ENERGY FROM AN ATOM. LIGHT BEHAVES LIKE A WAVE Recap PrefixSymbolMeaning Scientific Notation Tera T1...
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Transcript of ENERGY FROM AN ATOM. LIGHT BEHAVES LIKE A WAVE Recap PrefixSymbolMeaning Scientific Notation Tera T1...
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ENERGY FROM AN ATOM
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LIGHT BEHAVES LIKE A WAVE
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RecapPrefix Symbol Meaning Scientific
Notation
Tera T 1 000 000 000 000 1012
Giga G 1 000 000 000 109
Mega M 1 000 000 106
*Kilo K 1 000 103
Hecto H 1 00 102
Deka Da 1 0 101
Base : meter, mole, gram, & liter = 1
Deci d 1/1 0 0. 1 10-1
*Centi c 1/1 00 0. 01 10-2
*Milli m 1/1 000 0. 001 10-3
Micro µ 1/1 000 000 0. 000 001 10-6
Nano n 1/ 1 000 000 000 0. 000 000 001 10-9
Pico p 1/ 1 000 000 000 000 0. 000 000 000 001 10-12
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Length Scale:.1 meter (m): the average man is about 2 meters tall
1 centimeter (cm): the length of a red ant 1 cm = 1x10-2 m = 0.01 m
1 millimeter (mm): the size of a pencil point 1 mm = 1x10-3 m = 0.001 m
1 micrometer/micron (μm): 100 μm thickness of a sheet of paper 1 μm = 1x10-6 m = 0.000001 m
1 nanometer (nm): 2 nm is the width of a DNA helix 1 nm = 1x10-9 m = 0.000000001 m
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WAVES, FREQUENCY, & ENERGY
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C = λν
• c =speed of light= 3.00 x 108 m/s• =Frequency units Hertz = = sec-1
• λ =wavelength- unit nm
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Calculate the wavelength in nanometers of yellow light emitted from a sodium lamp if the frequency is 5.10 x 1014 Hz.
G, W, N
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Calculate the wavelength in nanometers of yellow light emitted from a sodium lamp if the frequency is 5.10 x 1014 Hz.
G, W, N
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ATOMIC SPECTRA
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E = h
• E=E= Energy of radiation= quantum of energy
units Joules (J)• =Frequency units Hertz = = sec-1
• h =Planck’s constant h = 6.626 × 10−34 J• s
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Ultraviolet radiation has a frequency of 6.8 × 1015 Hz. Calculate the energy, in joules, of the photon.G, W, N
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Draw the correct wave
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RADIO WAVES
longest lowest
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RADIO
Antenna picks up the radio waves & converts it to sound waves.• Each station broadcasts at a different
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MRI (MAGNETIC RESONACE IMAGING) Uses Short wave radio waves with a magnet to
create an image.
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MICROWAVES
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RADAR (Radio Detection and Ranging)
Sends out radio waves & measures the time it takes them to return
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Microwave ovens
Waves transfer energy to the water in the food causing them to vibrate which in turn transfers energy in the form of heat to the food.
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INFRARED RAYS
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VISIBLE LIGHT
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ULTRAVIOLET RAYS
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Used to kill bacteria.
(Sterilization of equipment)
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Causes your skin to produce
vitamin D (good for teeth and
bones)
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X- RAYS
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Bones and teeth absorb x-rays
light part of an x-ray image indicates a place where the x-ray was absorbed
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The rays pass through the cracks and the cracks appear dark on film.
Engineers use to check for tiny cracks in structures.
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GAMMA RAYS
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Used in radiation treatment to kill cancer cells.
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EXPLODING NUCLEAR WEAPONS EMIT GAMMA RAYS.
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UNIQUE ATOMIC SIGNATURESEach atom has a specific set of energy levels, and thus a unique set of photon wavelengths with which it can interact.
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FLAME TESTMetal Flame Color
Strontium
Calcium
Copper
Sodium
Potassium
Unknown A
Unknown B
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Make your own firework
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