Wave Classification: Electromagnetic vs. Particle Beams
Electromagnetic waves are disturbances in electric and magnetic fields that propagate through space. They travel at the speed of light and are composed of photons, which have no mass. Examples include radio waves, visible light, UV rays, X-rays, and gamma rays.
Let's analyze the options provided:
- Ultra Violet Rays: These are part of the electromagnetic spectrum.
- Infra-red Rays: These are also part of the electromagnetic spectrum.
- Gamma Rays: These are high-energy electromagnetic waves.
- Cathode Rays: These are streams of electrons (charged particles) moving at high speed. They possess mass and charge, unlike electromagnetic waves.
Based on this, Cathode Rays are fundamentally different from electromagnetic waves.
The option that is not an electromagnetic wave is Cathode Rays.
Important Questions from Oscillations & Waves
The frequency (f), wavelength (λ) and speed (v) of a sound wave are related as
The length of a simple pendulum is increased four times to its previous value while the mass is doubled. What is the ratio of the new and previous time period of the pendulum?
- Which of the following best describes the shape of a sinusoidal wave signal during one complete cycle?
- In which type of wave do particles of the medium move parallel to the direction of wave propagation?
- The interference of two identical waves moving in opposite directions produces:
