Page 11 - Final Science BB Prep2 Part one (2nd term) 2024-2025_Neat

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Science Prep.2

1-Water waves are transverse wave?

Because the particles of the medium vibrate perpendicular to the direction of wave
propagation.
2-Sound waves are longitudinal wave?

Longitudinal: Because the particles of the medium vibrate in the same direction of

wave propagation

Real life application:

Physiotherapy tubs (Jacuzzi): It is a tub where water

moves in the form of circular waves.
Hot Jacuzzi: It is used to treat sprains and cramps

Cold Jacuzzi: It is used to treat nervous tension

B)According to the ability to propagate and transfer energy:

Mechanical waves Electromagnetic waves

-They need medium to propagate. -They don’t need medium to propagate.

-Their speed is relatively low. -They can propagate in space.

-Some are transverse and others are -Their speed is great.

longitudinal waves. -All are transverse waves

Ex: water waves – sound waves Ex: Radio waves and light waves

Note:

1- BOTH MECHANICAL AND ELECTROMAGNETIC WAVES PROPAGATE IN
DIFFERENT MATERIALISTIC MEDIA WITH DIFFERENT VELOCITIES.
2-THE VELOCITY OF MECHANICAL WAVES MUCH SLOWER THAN THAT OF
ELECTROMAGNETIC WAVES.
3-ELECTROMAGNETIC WAVES CHARACTERIZED BY PROPAGATION IN SPACE
WITH VELOCITY 3X108 M/S

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