Explanation

• Gamma rays have the highest frequency, shortest wavelength, and highest photon energy.
• They have strong penetrating ability and can pass through many materials.

Additional information:

Electromagnetic Spectrum (High to Low Frequency):

1. Gamma rays
2. X-rays
3. Ultraviolet rays
4. Visible light
5. Infrared rays
6. Microwaves
7. Radio waves

Last verified on 15-10-2026

Explanation

• A transistor is a semiconductor component that can be used either as a switch or an amplifier.
• It controls the flow of electrical current in a circuit.

Last verified on 11-11-2026

Explanation

• A diode allows current in one direction only, blocking the reverse.
• This property makes it useful as a rectifier, converting AC into DC.

Last verified on 11-11-2026

Explanation

Silicon is widely used in semiconductors because:

• It is abundant in nature.
• It has suitable electrical properties.
• It has excellent thermal stability.
• It forms a stable oxide layer (SiO₂) useful in device fabrication.

Note: Germanium was used earlier, and gallium nitride is used for high-power or high-frequency devices, but silicon remains the standard.

Last updated 14-feb-2026

Explanation

• Rear view mirrors in vehicles are convex mirrors.
• They give a wider field of view.
• Images formed are virtual, upright, and smaller.
• This helps drivers see more traffic behind them.
• It is a curved mirror that bulges outward.
• It is commonly used in side mirrors of cars, buses, and motorcycles.

Last verified 26-04-2026