ENERGY FROM AN ATOM

LIGHT BEHAVES LIKE A WAVE

Recap PrefixSymbolMeaning Scientific Notation Tera T Giga G Mega M *Kilo K Hecto H Deka Da Base : meter, mole, gram, & liter = 1 Deci d1/ *Centi c1/ *Milli m1/ Micro µ1/ Nano n1/ Pico p1/

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 = m 1 micrometer/micron (μm): 100 μm thickness of a sheet of paper 1 μm = 1x10 -6 m = m 1 nanometer (nm): 2 nm is the width of a DNA helix 1 nm = 1x10 -9 m = m

Power of 10

WAVES, FREQUENCY, & ENERGY

Calculate the wavelength in nanometers of yellow light emitted from a sodium lamp if the frequency is 5.10 x Hz. G, W, N

Calculate the wavelength in nanometers of yellow light emitted from a sodium lamp if the frequency is 5.10 x Hz. G, W, N

ATOMIC SPECTRA

Ultraviolet radiation has a frequency of 6.8 × Hz. Calculate the energy, in joules, of the photon. G, W, N

Draw the correct wave

RADIO WAVES longest  lowest

RADIO Antenna picks up the radio waves & converts it to sound waves. Each station broadcasts at a different

MRI (MAGNETIC RESONACE IMAGING) Uses Short wave radio waves with a magnet to create an image.

MICROWAVES

RADAR (Radio Detection and Ranging) Sends out radio waves & measures the time it takes them to return

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.

INFRARED RAYS

VISIBLE LIGHT

ULTRAVIOLET RAYS

Used to kill bacteria. (Sterilization of equipment)

Causes your skin to produce vitamin D (good for teeth and bones)

X- RAYS

Bones and teeth absorb x-rays light part of an x-ray image indicates a place where the x-ray was absorbed

The rays pass through the cracks and the cracks appear dark on film. Engineers use to check for tiny cracks in structures.

GAMMA RAYS

Used in radiation treatment to kill cancer cells.

EXPLODING NUCLEAR WEAPONS EMIT GAMMA RAYS.

UNIQUE ATOMIC SIGNATURES Each atom has a specific set of energy levels, and thus a unique set of photon wavelengths with which it can interact.

FLAME TEST

Make your own firework