Question
Differentiate between the following:
Radio waves and light waves.

Answer

Radio waves Light waves
1. Radio waves are not visible to hum an eye. 1. Light waves are visible to human eye.
2. These waves range from $10^5$ to $10^{-3}$​​​​​​​ meters. 2. These waves range from $10^{-6}$ to $10^{-7}​​​​​​​$ meters.
3. Frequency of radio waves is below $10^7 Hz.$ 3. Frequency of light waves lie in the range $10^{14}$ to $10^{13} Hz.$
4. Its sources are TV and radio transmitters. 4. Its sources are sunlight, white hot bodies.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A boy stands in from of a cliff on the other side of a river. He fires a gun and hears an echo after $6$ seconds. The boy then moves backward by $170 \ m$ and again fires the gun. He hears an echo after $7$ seconds. Calculate
(i) width of river,
(ii) speed of sound.
How do you tune your radio set to a particular station?
Describe a simple experiment to verify the principle of moments, if you are supplied with a metre rule, a fulcrum and two springs with slotted weights.
A mass m1 of a substance of specific heat capacity c1 at temperature t1 is mixed with a mass m2
of other substance of specific heat capacity c2 at a lower temperature t2. Deduce the expression
for the temperature of the mixture. State the assumption made, if any.
(a) How would you demonstrate that a momentary current can be obtained by the suitable use of a magnet, a coil of wire and a galvanometer?
(b) What is the source of energy associated with the current obtained in part(a)?
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.
A circuit consists of a 1 ohm resistor in series with a parallel arrangement of 6 ohm and 3 ohm resistors. Calculate the total resistance if the circuit. Draw a diagram.
Why is less effort needed to lift a load over an inclined plane as compared to lifting the load directly?
A pendulum is oscillating on either side of its rest position. Explain the energy changes that takes place in the oscillating pendulum. How does the mechanical energy remains constant in it? Draw the necessary diagram.