🔋 Waves, Optics & Electricity

Chapter: Physics · Level ★★★ · Time: 25 min

SCORE___ / 20

NameClassDate

After this worksheet you can

Compare sound and light wavesApply Snell's lawUse Ohm's lawSolve series/parallel circuits

📚 Quick Recap

🎯 What you'll practice: Wave properties, Snell's law, Ohm's law, and series/parallel resistance with Kirchhoff's laws.

🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11

5Snell's law is written n1sinθ1 = .

6Kirchhoff's junction rule says total current in equals total current .

7A circuit has a 12V supply and 4Ω resistor. Find the current using Ohm's law.

8Two 6Ω resistors are connected in parallel. Find the total resistance.

9State Kirchhoff's loop rule (2nd law) in your own words.

🚀 Section C · Challenge ● CHALLENGE 5

10Explain why sound cannot travel through the vacuum of space but light can, referencing the wave type of each.

💭 Reflection — the most useful thing I learned:

A ___/4 B ___/11 C ___/5 Total ___/20 Teacher's Signature Parent's Signature

✂ answer key — fold or cut before handing out

1-B 2-A 3-A 4-B | 5 = n2sinθ2 6 = out 7 = I = V/R = 12/4 = 3 A 8 = 1/R = 1/6 + 1/6 = 2/6, so R = 3Ω 9 = the sum of all voltage rises and drops around any closed loop in a circuit equals zero | 10 = Sound is a longitudinal (mechanical) wave — it travels by vibrating the particles of a medium like air or water, so with no particles present in a vacuum it has nothing to vibrate and cannot propagate; light is an electromagnetic (transverse) wave made of oscillating electric and magnetic fields that do not need any material medium, so it travels through empty space perfectly well, which is how sunlight reaches Earth through the vacuum of space.

📄 Need offline practice?Print this worksheet or open the one-page cheat sheet.

🗒 Cheat Sheet

🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4

🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11

🚀 Section C · Challenge ● CHALLENGE 5