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Uncommon card · Science
Larmor formula, an Uncommon card
In electrodynamics, the Larmor formula is used to calculate the total power radiated by a nonrelativistic point charge as it accelerates.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 60
- DEF
- 25
- Power
- 85
- Wikipedia reads a year
- 27,000
Power 85 (ATK + DEF): stronger than 25 % of WikiCards cards.
Larmor formula quiz: 3 questions
Three questions on the Larmor formula card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
It was first derived by Joseph Larmor in 1897, in the ______ of the wave theory of light.
Answer
context. It was first derived by Joseph Larmor in 1897, in the context of the wave theory of light. From the Larmor formula article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Larmor formula. Larmor formula 60 · Bumper cars 56 · André Citroën 53 · Volkswagen Transporter 45 ATK in WikiCards.
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.
- It was first derived by Joseph Larmor in 1897, in the context of the wave theory of light.
- When any charged particle accelerates, energy is radiated in the form of electromagnetic waves.
- For a particle whose velocity is small relative to the speed of light, the total power that the particle radiates can be calculated by the Larmor formula: P = 2 3 q 2 4 π ε 0 c 2 = 2 3 q 2 a 2 4 π ε 0 c 3 = q 2 a 2 6 π ε 0 c 3 = μ 0 q 2 a 2 6 π c P = 2 3 q 2 a 2 c 3 where v ˙ or a {\
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Larmor formula article was read about 27,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 60 and blocks with 25: each hit it takes is cut by 10 %.
How to get Larmor formula
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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Credits
Text : Wikipedia, Larmor formula (revision), CC BY-SA 4.0. Photo : Aarchiba at English Wikipedia, Public domain, Wikimedia Commons.
