Advertisements
Advertisements
प्रश्न
Differentiate between the following:
Light and sound waves.
Advertisements
उत्तर
| Light waves | Sound waves |
| 1. These are electromagnetic waves. | 1. These are mechanical waves. |
| 2. They can travel in vacuum. | 2. They re qui re a materia I medium for propagation. |
| 3. The speed of light waves is very high ( = 3 x 108 m/s in air). | 3. The speed of sound waves is low ( =3 30 m/s in air). |
| 4. The wavelength of the light waves (visible) is very small, of the order of 10-6 m. | 4. The wavelength of sound waves is in the range of 10-2 m to lOm. |
| 5. These waves are transverse. | 5. These waves are lonaitud ina I waves. |
APPEARS IN
संबंधित प्रश्न
What are mechanical waves?
Distinguish between the free (or natural) and forced vibrations.
In following figure shows two tuning forks A and B of the same frequency mounted on two separate sound boxes with their open ends facing each other. The fork A is set into vibration.
- Describe your observation.
- State the principle illustrated by this experiment.
In following figure shows A, B, C and D are four pendulums suspended from the same elastic string XY. Lengths of pendulum A and D are equal, while the length of pendulum B is smaller and the pendulum C is longer. The pendulum A is set into vibration.
(a) what is your observation? (b) Give reason for your observation.
When a body vibrates under a periodic force, the vibrations of the body are ______.
(i) Define resonant vibrations.
(ii) Which characteristic of sound, makes it possible to recognize a person by his voice without seeing him?
Differentiate between the following:
Free and forced vibrations.
State two ways in which resonance differs from forced vibrations.
The rearview mirror of a motorbike starts vibrating violently at some particular speed of the motorbike, what could be done to stop the violent vibrations.
When the stem of vibrating tuning fork is pressed on a table, the tabletop starts vibrating. These vibrations are definitely an example of ______.
