• 🖤 Black Body: An object that absorbs all the radiation that falls on it. Nope, it's not a super-villain's weapon! It's just a perfect absorber and emitter of radiation.
• 🌈 Emission Spectrum: Even though a black body has a major colour (like the Sun's yellowish hue), it emits light of many different wavelengths. It’s like a singer who can sing many notes, not just one!

📏 Spectrometer: A cool tool that lets us see the intensity of radiation at various wavelengths. Think of it as a magic glass that tells us how "strong" or "intense" a color is.

• 💡 Definition: Intensity is the power emitted per square metre. Imagine how brightly a lightbulb shines on a specific spot.
• 📝 Formula
  • I=AP​
  • I = Intensity
  • P = Power emitted
  • A = Area receiving the power
• 📐 Units: Wm^-2 or Js^-1m^-2. Yes, it's a mouthful, but super useful!

• The Sun! It's kinda like a huge black body in the sky. If you graphed its radiation, you'd get a curve that shows how the intensity of its radiation changes across different wavelengths.
• 📊 What does this graph look like?
  • 🔝 Peak: Around 500nm (a shade between green and blue). Fun fact: our eyes are super sensitive in this region. Maybe that's evolution winking at us?
  • 🌈 All Visible Wavelengths: Yep, the Sun gives us all the colors.
  • 📈 Start: Begins with a steep rise from zero, but not exactly through the origin.
  • 📉 End: The intensity dwindles to almost zero for super long wavelengths.