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Lasers

When a particle drops from a higher to a lower energy level, what determines the emitted photon energy?

A

It equals the energy-level gap: ΔE=Eupper−Elower\Delta E=E_{\text{upper}}-E_{\text{lower}}ΔE=Eupper​−Elower​.

B

It equals the sum of the energy levels: ΔE=Eupper+Elower\Delta E=E_{\text{upper}}+E_{\text{lower}}ΔE=Eupper​+Elower​.

C

It equals the upper-level energy: ΔE=Eupper\Delta E=E_{\text{upper}}ΔE=Eupper​.

D

It equals the lower-level energy: ΔE=Elower\Delta E=E_{\text{lower}}ΔE=Elower​.

Lasers Flashcards

  1. A Level
  2. /Physics
  3. /Lasers

Flashcards for Eduqas A Level Physics Lasers, covering the key terms, definitions and equations you need to recall for Component 1, Component 2 and Component 3. 26 cards, matched to the Eduqas A Level Physics (A420QS) specification. Recall questions account for roughly 30% of marks at A Level Physics, so these target the marks you can secure before the paper starts.