Wednesday · April 22 · Online Session

FREQUENCY
FESTIVAL

You are at home. Right now, Wi-Fi microwaves pass through your walls. Infrared radiates from your body. UV reaches your window from the sun. Your TV remote fires IR pulses 38,000 times per second.

Today is not a lecture. Today is a Festival — six games, one video challenge, and an AI examiner who will not go easy on you. Let's go. 🎯

E2 · Quick Notes

Everything You Need to Know

Review these before the games. All wave types travel at the speed of light: v = f × λ = 3×10⁸ m/s

Wave	Wavelength	Frequency	Energy	Key Use

Key Formula

v = f × λ

v = speed of light = 3 × 10⁸ m/s
f = frequency (Hz) · λ = wavelength (m)
Higher frequency → shorter wavelength → more energy
Lower frequency → longer wavelength → less energy

The Golden Rule

All EM waves:
✓ Are transverse waves
✓ Travel at 3×10⁸ m/s in vacuum
✓ Need no medium to travel
✓ Transfer energy without transferring matter
✓ Are caused by oscillating electric & magnetic fields

Game 1 · Spectrum Survivor

Spectrum Survivor 🏆

Drag the wave types into the correct order — longest wavelength → shortest wavelength (left to right). One wrong placement and your slot turns red. All 7 correct = you survive!

🎯 ORDER: Longest λ → Shortest λ 0 / 7

Game 2 · Wave Detective

Wave Detective 🔍

Four real-world scenarios are shown. For each one, identify which EM wave is being described or used. Tap the correct wave type.

Game 3 · Wave Impostor 🕵️

Wave Impostor

Four statements appear. Three are TRUE. One is a LIE. Find the impostor and tap it. Five rounds — harder each time.

Round 1 / 5 Score: 0

Game 4 · Speed of Light Lab

v = f × λ Lab ⚡

Tune the frequency slider and watch wavelength update in real time. Then answer the three calculation challenges.

f = 1.0 × 10⁶ Hz | λ = 300 m | v = 3×10⁸ m/s

TUNE FREQUENCY:

📻 Radio📡 Micro🌡️ IR🌈 Vis☀️ UV🩻 X-Ray☢️ Gamma

Calculation 1

A radio station transmits at a frequency of 100 MHz (10⁸ Hz). What is the wavelength of these waves? (v = 3×10⁸ m/s)

Aλ = 0.3 m

Bλ = 3 m

Cλ = 30 m

Dλ = 300 m

Calculation 2

A microwave oven uses waves with wavelength λ = 0.12 m. What is their frequency? (v = 3×10⁸ m/s)

Af = 2.5 × 10⁹ Hz (2.5 GHz)

Bf = 2.5 × 10⁶ Hz (2.5 MHz)

Cf = 3.6 × 10⁷ Hz

Df = 3.6 × 10⁶ Hz

Calculation 3 · Challenge

X-rays used in hospitals have a frequency of 3 × 10¹⁸ Hz. What is their wavelength? Express in scientific notation.

Aλ = 1 × 10⁻¹⁰ m (0.1 nm)

Bλ = 1 × 10⁻⁸ m (10 nm)

Cλ = 1 × 10⁻⁶ m (1 μm)

Dλ = 9 × 10¹⁰ m

Game 5 · Home Wave Hunt 🎥

Home Wave Hunt

You are at home. EM waves are everywhere around you right now. Your mission: find them, film them, explain them.

📋 MISSION BRIEFING

Find any TWO EM wave sources around your home. Examples: microwave oven, TV remote, Wi-Fi router, phone screen, sunlight through a window, a lamp, a UV disinfection light...

Record a video of 30–60 seconds. Point to each source and say: the wave type, one property (wavelength/frequency/energy level), and one real use. Speak clearly — this is your science presentation!

Upload to Google Drive or YouTube (unlisted is fine), then paste the link below. Ahmad will review every video.

What to look for at home:

📺 TV Remote — Infrared pulses

📡 Wi-Fi Router — Microwaves 2.4/5 GHz

🍕 Microwave Oven — Microwaves 2.45 GHz

📱 Mobile Phone — Radio/Microwaves

☀️ Sunlight — UV + Visible + IR

💡 Light Bulb — Visible + IR

Paste your video link here: Briefly describe what you showed (1–2 sentences):

Game 6 · AI Examiner 🤖

The AI Examiner

The AI will ask you one question about EM waves. Answer in your own words — the examiner will push back if your answer is incomplete. This is the hardest challenge.

🤖 EXAMINER ONLINE

Hello! I'm your EM waves examiner. Press Start Exam to receive your question. I'll push you to think deeper — good luck! 🎯

E5 · Submit

Submit Your Festival Results

Choose your section and name, then submit everything to Ahmad's grade sheet.

Section

Your Name

0 / 7 challenges completed

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Festival Score

Ahmad reviews your video and AI examiner responses in class.