Question
Differentiate between the following:
Light and sound waves.
Light and sound waves.
✓
Answer
| 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 ( $= 3 x 10^8$ 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. |
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
An observer $X$ is on an island $5500 m$ from a vertical cliff on the shore. A ship Y is anchored between the island and the Cliff. A blast on the ship's siren is heard twice by $X$, the interval being 5 s . [Velocity of sound $=330 ms-1$ ]
(i) Find the distance of the ship from the island.
(i) Find the distance of the cliff from the ship.
→(i) Find the distance of the ship from the island.
(i) Find the distance of the cliff from the ship.
State and illustrate the rule used for finding the polarity of the faces of a circular coil.
Draw neat diagrams for the formation of images in case of convex lens and state its characteristics when the object is :
(a) At infinity (b) At 2 F (c) In between $F _1$ and $2 F_1$
→(a) At infinity (b) At 2 F (c) In between $F _1$ and $2 F_1$
A uniform metre rule rests horizontally on a knife-edge at the 60 cm mark when a mass of 10 gram is suspended from one end. At which end must this mass be suspended? What is the mass of the rule?
A force of $1$ kgf displaces a body by a distance of $10 \ cm$
(i) in direction of force,
(ii) normal to the force
(iii) at an angle of $60^\circ $ to the direction of the force.
Calculate the amount of work done in each case. (Take: $g = 9.8 ms^{−2}$ )
→(i) in direction of force,
(ii) normal to the force
(iii) at an angle of $60^\circ $ to the direction of the force.
Calculate the amount of work done in each case. (Take: $g = 9.8 ms^{−2}$ )
Two sets A and B of four bulbs each are glowing in two separate rooms. When one of the bulbs in set A is fused, the other three bulbs also cease to glow. But in set B, when one bulb fuses the other bulbs continue to glow. Explain the difference.
How many alpha and beta particles are emitted when Uranium nucleus $9 U ^{238}$ decays to Lead If ${ }_{82} Pb^{206}$ ?
→Distinguish between music and noise.
A house is provided with 15 bulbs of 40W, 5 bulbs of 100W, 5 fans of 80 W, and one heater of 1.0 kW. Each day bulbs are used for 4h, fans for lOh, and heater for 2h. The voltage of mains is 220 V. Calculate:
(i) Maximum power of the circuit in the house,
(ii) maximum current capacity of the main fuse in the house,
(iii) the electrical energy consumed in a week,
(iv) cost of electricity consumed at 1.25 Rs. per kWh.
(i) Maximum power of the circuit in the house,
(ii) maximum current capacity of the main fuse in the house,
(iii) the electrical energy consumed in a week,
(iv) cost of electricity consumed at 1.25 Rs. per kWh.
Why are the stringed instruments like guitar provided with a hollow sound box?