Transcript Wave technology - Black Rock Solar

OBJECTIVES
BY THE END OF THIS LESSON YOU SHOULD BE SAYING “I CAN…”
• LIST DIFFERENT TECHNOLOGIES THAT USE WAVELENGTHS AND FREQUENCIES TO CAPTURE AND
TRANSMIT INFORMATION AND ENERGY
• EXPLAIN HOW SOLAR PHOTOVOLTAIC CELLS USE WAVELENGTHS AND FREQUENCIES TO CREATE
ELECTRICITY
• I CAN EXPLAIN HOW THE WAVELENGTH AND FREQUENCY OF A WAVE ARE RELATED TO ONE ANOTHER BY
THE SPEED OF TRAVEL OF THE WAVE.
• I CAN USE REFLECTION, REFRACTION, AND TRANSMISSION OF WAVES TO INFLUENCE THE ELECTRICAL
POWER CREATED BY A SOLAR CELL.
RADIO
MICROWAVE
REMOTE CONTROL
VISIBLE LIGHT
UV LIGHT
PET/CT SCAN
TERRESTRIAL GAMMA-RAY FLASHES
TERRESTRIAL GAMMA-RAY FLASHES
(TGFS) ARE BRIEF BURSTS OF ENERGETIC
GAMMA-RAYS PRODUCED IN THE
ATMOSPHERE AND OBSERVED BY
SATELLITES. THESE FLASHES OCCUR ON
THE TOPS OF THUNDERSTORM CLOUDS.
An artisits impression
of a TGF. Credit: NASA.
Hunstville USA
• WHICH WAVE TOOK THE LEAST AMOUNT
OF ENERGY FOR YOU TO CREATE?
• WHICH WAVE TOOK THE MOST AMOUNT
OF ENERGY?
• CAN YOU RELATE THE SPEED OF TRAVEL OF
THE JUMP ROPE TO THE NUMBER OF
TIMES (OR FREQUENCY) THAT THE ROPE
HIT THE FLOOR?
PHOTOVOLTAIC (PV) CELLS
PV CELLS RESPOND TO VISIBLE LIGHT
WAVELENGTHS.
ALL OTHER WAVELENGTHS ARE EITHER
TOO SHORT OR TOO LONG, GOING
STRAIGHT THROUGH OR BOUNCING OFF
THE SOLAR CELL.
Roof-mounted PV solar array at Truckee Meadows
Community College built by Black Rock Solar
Light from the sun has enough energy to knock
an electron loose from an atom in a solar cell.
These electrons move to the top of the solar
cell and are conducted through metal strips to
wires connected to the top of the solar cell to
the back of the solar cell.
The flow of electrons through this complete
circuit creates electricity!
SMALL GROUP DISCUSSION
• WHICH LIGHT SOURCES PRODUCED THE HIGHEST VOLTAGE?
• WHICH LIGHT SOURCES PRODUCED THE LEAST VOLTAGE?
• DID ANY PRODUCE NO POWER AT ALL? WHICH ONE(S)?
• DID YOU NOTICE ANY TRENDS WITH THE LIGHT SOURCES?
GATHER IN YOUR GROUP
• FIND A STATION THAT PRODUCED AT LEAST SOME VOLTAGE
• BE VERY CAREFUL WITH LIGHT SOURCES THAT CREATE A LOT OF HEAT!
• RECORD THE DISTANCE OF THE LIGHT SOURCE,
• RECORD THE VOLTS PRODUCED ON THE GRAPH
• USE THE MAGNIFYING GLASS TO SEE WHAT HAPPENS (IF ANYTHING!)
• USE THE MIRROR TO REFLECT LIGHT ON THE SOLAR CELL AND RECORD RESULTS.
• COMPLETE YOUR STUDENT GUIDES USING THE DATA YOU COLLECTED
RECAP
• CAN YOU DESCRIBE THE WAVELENGTHS AND FREQUENCIES THAT DIFFERENT TECHNOLOGIES USE, IN
PARTICULAR THE SOLAR PHOTOVOLTAIC (PV) CELL.
• THE SHORTER THE WAVELENGTH THE ________________ THE FREQUENCY.
• THE LONGER THE WAVELENGTH THE _____________ THE FREQUENCY.
• WHICH HAS MORE ENERGY, SHORTER OR LONGER WAVELENGTHS? WHICH COLOR HAS MORE “ENERGY,”
BLUE OR RED? WHAT COLOR DID THE PV CELL RESPOND BETTER TOO?
• CAN YOU USE REFLECTION, REFRACTION, AND TRANSMISSION OF WAVES TO INFLUENCE THE VOLTAGE
CREATED BY A SOLAR CELL.