Page 47 - Demo

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Atomic Structure
45
Atomic Structure—Demonstration Kits, continued
Drawing with Light—Photoelectric Effect Demonstration Kit
By: The Flinn Staff
The Photoelectric Effect Demonstration is a visually captivating discrepant event that provides a clear way to show how intensity, or brightness, of light is not equal to its energy. A super value with ready- to-go assembled materials will inspire classroom discussion year after year! Simply hold and slide the photoelectric board against the phos- phorescent sheet and allow your students to make observations. Which color LED contains enough energy to produce a glow on the sheet? You will appreciate the time savings with this version of Einstein’s photoelectric effect, and your students will appreciate this fun, colorful, energy-packed demonstration!
Catalog No.
Description
Price/Each
AP9582
Drawing with Light—Photoelectric Effect Demonstration Kit
$123.95
Drawing with Light— Photoelectric Effect Demonstration Kit AP9582
The Photoelectric Effect—
Light Energy Demonstration Kit
By: The Flinn Staff
The discovery of the photoelectric effect opened the door to under- standing electron structure. Explaining how it proves the “quantum” energy of light has never been easy, however—until now! Demonstrate the photoelectric effect using a zinc plate attached to a charged elec- troscope. Simply charge the electroscope negatively using a rubber rod, and then shine short wavelength UV light from the sun or a lamp onto the zinc surface. Electrons given off by the zinc metal cause the electroscope “leaves” to collapse as the negative charge on the electro- scope is neutralized by the resulting positive charge on the zinc. If the light is below the minimum threshold energy, the electroscope will not discharge, regardless of how bright the light source. Demonstration Notes included.
Concepts: Photoelectric effect, energy and wavelength of light, quan- tization of energy.
Time Required: 20 minutes
Materials Provided: Electroscope, copper and zinc plates, rubber rod/ wool, sandpaper.
Note: The demonstration may be performed outdoors using ultraviolet
light from the sun. Performing the demonstration indoors requires a short wavelength UV lamp, which is available separately.
Catalog No.
Description
Price/Each
AP6627
The Photoelectric Effect— Light Energy Demonstration Kit
$ 51.50
AP6658
Ultraviolet Lamp, Short Wave
124.30
The Photoelectric Effect— Light Energy Demonstration Kit AP6627
Spectroscopy Equipment and Charts
See page 228 and flinnsci.com.
Compound InterestTM A History of
the Atom: Theories and Models
How did we arrive at our current model of the
atom? Have fun solidifying atomic theory concepts with this colorful poster. Watch the history of the atom unfold from Dalton’s model to Shrödinger’s! Laminated, 24" x 36".
Catalog No.
Description
Price/Each
AP9904
Compound InterestTM A History of the Atom: Theories and Models
$22.95
ATOMIC STRUCTURE—DEMONSTRATION KITS continued on next page.
Compound InterestTM A History of the Atom: Theories and Models
AP9904