Get this diffraction grating here: explore light source spectra!
From Amazon: BUY NOW: 500 line/mm diffraction grating
Vintage Bulb Spectra: emission line spectra identify the gas within these two vintage discharge glow bulbs- revealed here by a 500 line/mm diffraction grating. The color of each gas is due to a mix of the colors emitted from electron energy transitions specific to each element, the basis of spectroscopy.
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From EngineDIY: BUY NOW: Handheld Tesla Coil
See other inexpensive tesla coils in my collection
Handheld Tesla Coil: each pull of the trigger discharges a large capacitor (seen through the clear window) with a loud pop and a tiny lightning bolt then streaks from the tip. In this variation of the famous air core double-tuned resonate transformer invented by Nikola Tesla in 1891, the 10 cm long sparks are made possible by a very high voltage, but are made fairly safe due to a very low current (mA)- the discharge feels like a light sting (but don’t touch the electrode- it gets hot). This battery powered version is friendly for demonstrations, such as exciting an ampule of neon gas to glow brightly during the high voltages discharges (swipe to view in slow motion).
Get a blank bracelet here:
From Amazon: BUY NOW: Color Changing RGB Bracelet
Personalized bracelets avialable here: BUY NOW: Color Changing Personalized Bracelet
Get this diffraction grating here to explore light source spectra:
From Amazon: BUY NOW: 500 line/mm diffraction grating
RGB Lightpipe Rave Bracelet: three LEDs (red, green,blue) combine to make an entire pallet of colors that are transmitted through the translucent band via internal reflection and refraction like a fiber optic cable. A diffraction grating reveals the variety of colors produced is simply a mixture of red, green, and blue (note that white = R+B+G), the same way pixels on your phone or laptop use RGB mixing to produce color images. The bracelet can be personalized and has a magnetic clasp- fun physics for your next rave!
Special discount for @physicsfun followers: use coupon code below!
From EP DesignLab: BUY NOW
EP Lights LED Bulb Art
coupon code: PHYFUN (10% off)
Viscous Flow Mixing Bulbs: art from mixing high viscosity fluids. Each LED bulb from EP Designlab captures a unique pattern based on the physics of laminar flow folding resulting from the mixing of viscous fluids- in this case silicone resins. When the resins cure the pattern is captured and frozen in place ready to display as illuminated by an array of 5 LEDs in the standard E26 bulb base. With this process no two bulbs are alike, and all capture intricate mixing physics.
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From ProtoshopLLC: BUY NOW: Lucite Cube Element 10 Neon
Need a mini Tesla Coil?
From engineDIY: BUY NOW: Mini Tesla Coil
Element 10, Neon: a pure sample of the famous noble gas in a glass ampule encased within a lucite cube. But how can we know that the glass tube is actually filled with neon gas? If the sample is brought near the 50,000 Volt high frequency electric field of a miniature Tesla coil, the gas will glow with the characteristic orange light from the electron energy transitions specific only to neon. Note that the glow deceases as the sample is moved away from the coil in proportion to the electric field intensity- and that there is an excitation threshold, the gas needs a higher intensity (closer to coil) to initiate the glow discharge but will still glow when moved further away.