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Uncommon card · Science
Caesium standard, an Uncommon card
The caesium standard is a primary frequency standard in which the photon absorption by transitions between the two hyperfine ground states of caesium-133 atoms is used to control the output frequency.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 65
- DEF
- 36
- Power
- 101
- Wikipedia reads a year
- 57,000
Power 101 (ATK + DEF): stronger than 55 % of WikiCards cards.
Caesium standard quiz: 3 questions
Three questions on the Caesium standard card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
In which decade?
The first caesium clock was built by Louis Essen in ____ at the National Physical Laboratory in the UK and promoted worldwide by Gernot M. R. Winkler of the United States Naval Observatory.
Answer
1950s. The first caesium clock was built by Louis Essen in 1955 at the National Physical Laboratory in the UK and promoted worldwide by Gernot M. R. Winkler of the United States Naval Observatory. From the Caesium standard article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Caesium standard. Caesium standard 65 · Capture the flag 62 · Donald Michie 59 · CMYK color model 54 ATK in WikiCards.
Which of these Wikipedia articles is read the most in a year?
Answer
CMYK color model. CMYK color model 200,000 · Data structure 110,000 · Caesium standard 57,000 · Scroll 42,000 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.
- The first caesium clock was built by Louis Essen in 1955 at the National Physical Laboratory in the UK and promoted worldwide by Gernot M. R. Winkler of the United States Naval Observatory.
- Caesium atomic clocks are one of the most accurate time and frequency standards, and serve as the primary standard for the definition of the second in the International System of Units, the modern metric system.
- By definition, radiation produced by the transition between the two hyperfine ground states of caesium-133 has a frequency, ΔνCs, of exactly 9192631770 Hz.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Caesium standard article was read about 57,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 65 and blocks with 36: each hit it takes is cut by 14 %.
How to get Caesium standard
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.
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Card lists
- Wikipedia quizNew questions every day
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- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Caesium standard (revision), CC BY-SA 4.0. Photo : National Institute of Standards and Technology - Physics Laboratory: Time and Frequency Di, Public domain, Wikimedia Commons.
