DO IT YOURSELF MAGNETIC LEVITATION

SUPERCONDUCTOR

FACTS ABOUT WAVES

Things u should know about waves..

1. Waves transfer energy without transfering the matter.
2. In transverse waves, its particles vibrate perpendicular to the wave direction.
3. Longitudinal wave's particles vibrate parallel to the wave direction.
4. The amplitude of a wave determines its energy. Higher amplitude has greater energy.
5. Damping of wave causes decrease in amplitude & energy.
6. Waves' wavefront is always pependicular to the direction of the waves.
7. Waves undergo all of these phenomena; reflection, refraction, diffraction & interference.
8. Water,light & electromagnetic waves are transverse waves.
9. Coherent waves have same frequency ,amplitude and in phase.
10.As the frequency of a wave increases its energy increases and its wavelength decreases.
11.Shorter waves with higher frequencies have shorter periods.


Facts about Light Wave

1. Light is a transverse wave
2. Light slows down, bends toward the normal and has a shorter wavelength when it enters a higher refractive index(n) or as it moves to denser medium..
3. Medium with higher refractive index has higher optical density.
4. At the critical angle a light wave will be refracted to 90 degrees.
5. Blue light has more energy,a shorter wavelength and a higher frequency than red light (remember- ROYGBIV).
6. Monochromatic light has one color, frequency & wavelength.

Facts about water waves

1. Water waves moves faster at deeper region. This change in speed causes refraction of water waves.
2. Water waves has longer wavelength at deeper region.
3. Deeper region is less dense than shallow region.
4. Water waves bended towards normal as it moves from deeper to shallow region.
5. After diffraction, water waves amplitude decrease thus its energy decrease as well.However its speed, wavelength & frequency remain constant.

Facts about sound waves

1. Sound is a longitudinal waves.
2. Sound is produced through vibration, thus compressing & stretching the surrounding air molecules.
3. Louder sound has bigger amplitude.
4. Sound with high pitch has higher frequency.
5. The sound that we hear is known as 'audio sound' that has freuency between 20-20khz.
6. Those sound below 20hz is known as infrasound. While sound with frequency beyond 20khz is known as ultrasonic.
7. Sound require medium to travel. It travels fastest in solid> liquid> gas.
8. Sound can't be heard in vacuum..Therefore..Starwars' sound effect in outer space is a myth :)

INTERFERENCE OF WAVES

When two or more waves simultaneously and independently travel through the same medium at the same time, their effects are superpositioned. The result of that superposition is called interference. There are two types of interference: constructive and destructive.

Constructive interference occurs when the wave amplitudes reinforce each other, building a wave of even greater amplitude.




Destructive interference occurs when the wave amplitudes oppose each other, resulting in waves of reduced amplitude.

AN AERIAL VIEW OF DIFFRACTION OF SEA WAVES

VELOCITY FORMULA

Today we are going to discuss velocity and then the velocity formula. First of all, we are going to define what velocity is.

Definition of velocity
Velocity is similar to speed but it has direction. Let's recap what a speed is. Speed is the rate at which something is moving.

For example, a swimmer may swim at the speed of 1 meter per second but he or she swims at the velocity of 1 meter per second east. By specifying that he or she swims in the eastwardly direction, you are defining the velocity he or she swims at. So, when you measure velocity, remember to report both speed and direction, the two components of velocity.



Velocity formula



Since velocity has direction, it is referred to in Physics as a vector quantity. A vector quantity means it is directional as opposed to a scalar quantity which is what speed is. The formula of velocity used in physics is the same as the formula used for measuring average speed per direction. Let's examine how the velocity formula works.



In the diagram above, the three velocities represented are A, B, and C. A is the speed measured in the Eastward direction, B is the speed measured in the south-eastern direction and C is the speed measured in the Northeast direction. For example, velocity A is 10 m/s east, V is 20 m/s southeast and C is 15 m/s northeast.

That's it. The velocity is measured in meter per second, the same SI unit as speed. Just remember to specify direction when reporting the velocity.

MUZIK GAMELAN

Reflection of light in concave mirror

Reflection of light

Reclection of light