How does Counterspell interact with the Detect Magic spell?


  1. If a character casts Counterspell against Detect Magic as it is being cast, will the caster of Detect Magic know this, or will they think there is no magic present for the duration of the spell? Does the caster of Detect Magic know it’s been counterspelled?

  2. RAW I assume the answer is no, but if Detect Magic is already cast and active, does Counterspell have any effect?