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WikiCards · Card list · Science cards · Focus
Uncommon card · Science
Focus, an Uncommon card
In geometrical optics, a focus, also called an image point, is a point where light rays originating from a point on an object converge.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 44
- DEF
- 14
- Power
- 58
- Wikipedia reads a year
- 20,000
Power 58 (ATK + DEF): stronger than 5 % of WikiCards cards.
Focus quiz: 3 questions
Three questions on the Focus card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
This non-ideal focusing may be caused by aberrations of the ______ optics.
Answer
imaging. This non-ideal focusing may be caused by aberrations of the imaging optics. From the Focus article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Focus. Focus 44 · Inezgane-Aït Melloul Prefecture 41 · Ka with stroke 36 · Cheongsachorong 32 ATK in WikiCards.
Which of these Wikipedia articles is read the most in a year?
Answer
Focus. Focus 20,000 · Precision engineering 10,000 · Inezgane-Aït Melloul Prefecture 360 · Joseph Hippolyt Pulte 230 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.
- Although the focus is conceptually a point, physically the focus has a spatial extent, called the blur circle.
- This non-ideal focusing may be caused by aberrations of the imaging optics.
- Even in the absence of aberrations, the smallest possible blur circle is the Airy disc caused by diffraction from the optical system's aperture, diffraction is the ultimate limit to the light focusing ability of any optical system.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Focus article was read about 20,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 44 and blocks with 14: each hit it takes is cut by 6 %.
How to get Focus
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 Focus in the power ranking, all domains together.
- BitternUncommon · Nature · ATK 41 DEF 17
- Isaac Hayes IIIUncommon · Arts · ATK 43 DEF 15
- Aaron StainthorpeUncommon · Arts · ATK 43 DEF 15
- La BlanchisseuseUncommon · Arts · ATK 40 DEF 18
- KaletteCommon · Society · ATK 38 DEF 20
- Al Nahda, DubaiCommon · Society · ATK 40 DEF 18
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, Focus (revision), CC BY-SA 4.0. Photo : Javalenok, CC BY-SA 3.0, Wikimedia Commons.
