PHYSICS

Blogger's note: The information I will be posting today aren't mine. They were all taken during our discussion in our Advanced Physics II class with Mr. Mohamad Ali Ramber. The pictures and animations aren't also mine. Credits to the rightful owners who placed it in google

LIGHT

Light behaves as a particle and a wave. Soundwaves travel through air (medium). Light has no medium (wave property). Photons make up light (particle property)

Energy in each photon is based on frequency.

E = hf, where h is Plank's constant which is approximately equal to 6.626 x 10^-34 J.S

Blue light bends most while red light bends the least.

CORPUSCULAR THEORY OF LIGHT (1704)

• Isaac Newton
• Contains a stream of small particles
• Travels in straight lines at great speeds
• reflected from mirrors in a predictable way

WAVE THEORY OF LIGHT

• Thomas Young
• Light is a wave
• undergoes diffraction and interference (Young's double-slit experiment)

LIGHT AS PARTICLE

• position "x", momentum p=mv, mass "m"

LIGHT AS WAVE

• wavelength, amplitude, frequency

WAVES vs PARTICLES

• a particle is localized in space and has discrete physical properties such as mass.
• Wave is inherently spread out, could have amplitudes in a continuous range
• waves superpose and pass through each other, while particles collide and bounce off each other.

Diffraction

 -spreading out of the plane waves as they pass through a hole.

Interference

1. Constructive Interference - occurs where wave crests meet
2. Destructive Interference - occurs where wave crest and trough meet.

BLACKBODY RADIATION

• Blackbody is an object which totally absorbs all radiation that falls on it
• Any hot body radiates light over the whole spectrum of frequencies