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WikiCards · Card list · Science cards · Photocathode
Common card · Science
Photocathode, a Common card
A photocathode is a surface engineered to convert light into electrons using the photoelectric effect.
- Rarity
- Common
- Domain
- Science
- ATK
- 62
- DEF
- 34
- Power
- 96
- Wikipedia reads a year
- 8,800
Power 96 (ATK + DEF): stronger than 40 % of WikiCards cards.
Photocathode quiz: 3 questions
Three questions on the Photocathode card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
Electron beams generated with ______ are commonly used for free electron lasers and for ultrafast electron diffraction.
Answer
photocathodes. Electron beams generated with photocathodes are commonly used for free electron lasers and for ultrafast electron diffraction. From the Photocathode article on Wikipedia.
Which of these Wikipedia articles is read the most in a year?
Answer
S10. S10 18,000 · Algebraic combinatorics 11,000 · Photocathode 8,800 · Percy Ernst Schramm 6,000 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.
- Photocathodes are important in accelerator physics where they are utilised in a photoinjector to generate high brightness electron beams.
- Electron beams generated with photocathodes are commonly used for free electron lasers and for ultrafast electron diffraction.
- Photocathodes are also commonly used as the negatively charged electrode in a light detection device such as a photomultiplier, phototube and image intensifier.
Why it is Common
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Photocathode article was read about 8,800 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 62 and blocks with 34: each hit it takes is cut by 14 %.
How to get Photocathode
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 Science cards
Cards close in power
The cards just above and just below Photocathode in the power ranking, all domains together.
- United States L-class submarineCommon · History · ATK 61 DEF 35
- Sue MyrickCommon · History · ATK 59 DEF 37
- Laura KrautCommon · Society · ATK 59 DEF 37
- Gabriel P. SanchezCommon · Society · ATK 56 DEF 40
- José de AlencarCommon · History · ATK 58 DEF 38
- Palouse RiverCommon · Nature · ATK 54 DEF 42
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- Science cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Photocathode (revision), CC BY-SA 4.0. Photo : Martin A. H. Schmeißer, Sonal Mistry, Hans Kirschner, Susanne Schubert, Andreas Jankowiak,, CC BY-SA 4.0, Wikimedia Commons.
