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2. Einstein's thought experiments - Wikipedia

   en.wikipedia.org/wiki/Einstein's_thought_experiments

   [6]: 348–349 Consider the illustration of Einstein's light box: [12]: 446–448 1. After emitting a photon, the loss of weight causes the box to rise in the gravitational field. 2. The observer returns the box to its original height by adding weights until the pointer points to its initial position.

3. Lightbox - Wikipedia

   en.wikipedia.org/wiki/Lightbox

   When laid flat, it may be called a light table. Generally, a lightbox uses light similar to daylight (5,000–6,000 kelvins (K)) and has uniform light strength on the glass pane. [3] In the form of vertical panels, they can also be found mounted on the walls of hospitals and medical offices to review X-ray images (X-ray illuminator). [4]

4. Light table - Wikipedia

   en.wikipedia.org/wiki/Light_table

   Light table at Tito's bunker Draftsman using light table. A light table [1] is a viewing device that is used to review photographic film or artwork placed on top of it. A horizontal form of a self-standing lightbox, it provides even illumination of the subject from below through a translucent cover and fluorescent lights that emit little heat.

5. Camera obscura - Wikipedia

   en.wikipedia.org/wiki/Camera_obscura

   While the use of the camera obscura has waxed and waned, one can still be built using a few simple items: a box, tracing paper, tape, foil, a box cutter, a pencil, and a blanket to keep out the light. [84] Homemade camera obscura are popular primary- and secondary-school science or art projects.

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Prince William pens personal birthday message to wife Kate ...

   www.aol.com/prince-william-pens-personal...

   Catherine, Princess of Wales, turns 43 on Jan. 9 and received a sweet message from her husband, Prince William. “To the most incredible wife and mother. The strength you’ve shown over the last ...