This week’s Light Science activity was so fun, I just had to share! After brainstorming all the different natural and artificial sources of light we could come up with and defining terms such as “Transparent” “Translucent” and “Opaque”, the students and I had fun watching “holograms” float before our very eyes! This illusion is actually a technique used in theatre, amusement parks, museums and television. It is commonly known in the industry as “Pepper’s Ghost”. It is named after English scientist John Henry Pepper who popularized the effect in the 1800s. It’s made possible when a real or recorded image is reflected in a transparent screen at a 45 degree angle.
Using this template you too can create a reflective screen to use on your smartphone or tablet out of any thin clear plastic. Though not a true hologram, you will be able to find many clips to show on your inverted pyramid viewer by searching the term “smartphone hologram”.
You can use a clear plastic 2 liter bottle, packaging material, an overhead projector sheet or any other thin clear film that will hold a crease when folded.
Here is a link to a video to use with the inverted pyramid screen for your at home Light Science activity.