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Obey Refraction It's The Law (Optics Snell's Law) Coffee Mug
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Classic Mug
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Obey Refraction It's The Law (Optics Snell's Law) Coffee Mug
Showcase wry optical humour with this design featuring Snell's law, which says that the ratio of the sines of the angles of incidence and of refraction is a constant that depends on the media. Snell's law is also known as Descartes' law or the law of refraction. Make others do a double-take with any of these scientific truism refraction humour gifts that include the tongue-in-cheek saying "Obey Refraction It's The Law". No need to be a physics major to enjoy!
Customer Reviews
4.8 out of 5 stars rating22.2K Total Reviews
22,185 Reviews
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1 out of 5 stars rating
By Keira B.August 7, 2025 • Verified Purchase
Classic Mug, 325 ml
I was originally happy about my purchase and Nana loved the gift. HOWEVER, the description specifically says that these are microwave and dishwasher safe, BUT the first time Nana put this mug in the dishwasher it was destroyed. Not impressed..
5 out of 5 stars rating
By Courtney V.December 17, 2020 • Verified Purchase
Classic Mug, 325 ml
Zazzle Reviewer Program
Nana is going to love this gift from her granddaughter! Good quality mug. Photos turned out good, colours are true as expected!
5 out of 5 stars rating
By Zoe J.February 4, 2018 • Verified Purchase
Zazzle Reviewer Program
I am very satisfied with the quality of this product. The printing of the image on the mug was absolutely perfect and the quality of the mug itself was very good as well. I would recommend this product to anyone. I am very pleased with how the printing on the mug turned out. The image was clear, not blurry at all, and easy to see. I would recommend this product to anyone.
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Product ID: 168164079717641711
Designed on 2009-11-11, 10:52 PM
Rating: G
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