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WikiCards · Card list · History cards · Birefringence
Uncommon card · History
Birefringence, an Uncommon card
Birefringence, also called double refraction, is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light.
- Rarity
- Uncommon
- Domain
- History
- ATK
- 79
- DEF
- 68
- Power
- 147
- Wikipedia reads a year
- 98,000
Power 147 (ATK + DEF): stronger than 80 % of WikiCards cards.
Birefringence quiz: 3 questions
Three questions on the Birefringence card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
These optically anisotropic materials are described as ______ or birefractive.
Answer
birefringent. These optically anisotropic materials are described as birefringent or birefractive. From the Birefringence article on Wikipedia.
Which of these Wikipedia articles is read the most in a year?
Answer
Locomotive. Locomotive 130,000 · Birefringence 98,000 · Alcuin 69,000 · Physics beyond the Standard Model 49,000 Wikipedia reads over a year.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- These optically anisotropic materials are described as birefringent or birefractive.
- The birefringence is often quantified as the maximum difference between refractive indices exhibited by the material.
- Crystals with non-cubic crystal structures are often birefringent, as are plastics under mechanical stress.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Birefringence article was read about 98,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 79 and blocks with 68: each hit it takes is cut by 27 %.
How to get Birefringence
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
More History cards
Cards close in power
The cards just above and just below Birefringence in the power ranking, all domains together.
- PhilodendronUncommon · Nature · ATK 78 DEF 69
- StadiumUncommon · Society · ATK 76 DEF 71
- Vladimir-SuzdalUncommon · History · ATK 72 DEF 75
- AquariumUncommon · Society · ATK 81 DEF 66
- TaiyuanUncommon · Society · ATK 80 DEF 67
- Acer rubrumUncommon · Nature · ATK 73 DEF 74
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- History cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Birefringence (revision), CC BY-SA 4.0. Photo : APN MJM, CC BY-SA 3.0, Wikimedia Commons.
