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WikiCards · Card list · Society cards · Black-body radiation
Rare card · Society
Black-body radiation, a Rare card
Black-body radiation is the thermal electromagnetic radiation emitted from a body in thermodynamic equilibrium with its environment.
- Rarity
- Rare
- Domain
- Society
- ATK
- 81
- DEF
- 84
- Power
- 165
- Wikipedia reads a year
- 250,000
Power 165 (ATK + DEF): stronger than 85 % of WikiCards cards.
Black-body radiation quiz: 3 questions
Three questions on the Black-body radiation card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
A black body is an ______ opaque and non-reflective body.
Answer
idealized. A black body is an idealized opaque and non-reflective body. From the Black-body radiation article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Nuclear fusion. Nuclear fusion 88 · Cassette tape 84 · Black-body radiation 81 · Kelvin 75 ATK in WikiCards.
Which of these Wikipedia articles is read the most in a year?
Answer
Nuclear fusion. Nuclear fusion 370,000 · Black-body radiation 250,000 · Grenade 200,000 · CMOS 160,000 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.
- A black body is an idealized opaque and non-reflective body.
- The radiation emitted is a continuous spectrum over all possible radiation wavelengths that depends only on the body's temperature.
- A perfectly-insulated enclosure which is in thermal equilibrium internally contains black-body radiation and will emit it through a hole made in its wall, provided the hole is small enough to have a negligible effect upon the equilibrium.
Why it is Rare
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Black-body radiation article was read about 250,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 81 and blocks with 84: each hit it takes is cut by 34 %.
How to get Black-body radiation
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 Society cards
Cards close in power
The cards just above and just below Black-body radiation in the power ranking, all domains together.
- Cassette tapeRare · Science · ATK 84 DEF 81
- FernRare · Nature · ATK 80 DEF 85
- Nizhny NovgorodRare · Society · ATK 85 DEF 80
- Ibn KhaldunRare · Science · ATK 84 DEF 81
- Juan Carlos FerreroRare · Society · ATK 83 DEF 82
- Hudson BayRare · Nature · ATK 78 DEF 87
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- Society cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Black-body radiation (revision), CC BY-SA 4.0. Photo : Darth Kule, Public domain, Wikimedia Commons.
