Invisibility for Muggles!

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Recent advances have brought us closer than ever to mastering one of the holy grails of science: invisibility. With an Invisibility Kit and this hands-on STEM activity uses a simple four lens set-up to get a close look at using light’s refractive property to create regions of invisibility. We can also explore the math that makes it work, and how invisibility is useful to Muggles.

Grade Range:
9 to 14

Duration
1/2 Hour – 1 Hour

Supplies

Laser Classroom Invisibility Kit OR 2 double convex lenses with Focal Length 50mm 2 double convex lenses with Focal Length 150mm Optics Bench/ Meter Stick Laser Pointer

NGSS Connections

PS4:A Wave Properties and PS4.B: ElectroMagnetic Radiation

Waves can add or cancel one another as they cross, depending on their relative phase (i.e., relative position of peaks and troughs of the waves), but they emerge unaffected by each other. (HS-PS4-3)
The path that light travels can be traced as straight lines, except at surfaces between different transparent materials (e.g. air and water, air and glass) where the light path bends (MS-PS4-2)