To identify which option is NOT an electromagnetic wave, let's examine the nature of each option listed:
- Light wave: Light is a form of electromagnetic radiation, within the visible range of the electromagnetic spectrum. It is an electromagnetic wave.
- Radio wave: Radio waves are part of the electromagnetic spectrum with longer wavelengths. They are commonly used for communication. Thus, they are electromagnetic waves.
- Sound wave: Sound waves are mechanical waves that require a medium (like air, water, or solids) to travel through. They are not electromagnetic waves as they involve the oscillation of particles in the medium, not electromagnetic fields.
- Micro wave: Microwaves are electromagnetic waves found in the electromagnetic spectrum, used in radar technology and microwave ovens.
Therefore, the correct answer is that sound wave is NOT an electromagnetic wave. Sound relies on the vibration of particles rather than the oscillation of electromagnetic fields.
Important Questions from Waves
- A high-pitch and a low-pitch sound have ________, respectively.
- The radar used by police to check over-speeding vehicles works on the principle of
- Wavelength and frequency of a radio wave are 12 m and 25 × 106 Hz respectively. Calculate its velocity.
Ultrasonic pulse echo technique, a non-destructive ultrasonic testing, is employed for any possible flaw detection in a metallic bar of thikness 30 cm. If the arrival times of the ultrasonic pulses are 45 μs and 90 μs respectively, the distance of the flaw from one end of the steel bar at which the ultrasonic pulse initially enters the steel bar, will be:
In which of the following medium, velocity of light is maximum?
