4 original questions from New Regents. The worksheet, answer key, and browser practice are free.
Matching Two Pulses by Energy 4 questions
Matching Two Pulses by Energy
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A light display models short pulses of two colors. Each red photon carries 2 model energy units, and each violet photon carries 3. Energy delivered by a pulse is the number of photons multiplied by the energy per photon.
| Pulse | Color | Photons arriving |
|---|---|---|
| J | Red | 12 |
| K | Violet | 8 |
| L | Violet | 10 |
Question 1
Which two pulses deliver equal energy even though they contain different numbers of photons?
- J and K
- J and L
- K and L
- All three
A model card absorbs half the incoming red photons and three quarters of the incoming violet photons. Each absorbed photon transfers all its energy to the card.
Question 2
Calculate the absorbed energy from J and K. Show how the fraction absorbed changes the comparison.
Write your answer and work on the printable worksheet, or answer online.
Question 3
Use J and K to evaluate the claim that equal delivered energy means equal energy absorbed by this card.
Write your answer and work on the printable worksheet, or answer online.
Question 4
How many incoming red photons would transfer the same absorbed energy to the card as pulse K? Show your calculation.
Write your answer and work on the printable worksheet, or answer online.
2025 Chemistry Reference Tables · Browse Chemistry worksheets