Explanation

• Infrared waves are used in night vision equipment.
• They detect heat emitted by objects.
• It allowing visibility in low-light conditions.

Last verified on 29-10-2026

Explanation

• Paschen, Brackett, Pfund, Humphreys = Infrared

Additional information:

• Lyman series = Ultraviolet
• Balmer series = Visible

Last verified on 29-10-2026

Explanation

• The value of Planck's constant is 6.63 × 10⁻³⁴ Js.
• This constant is fundamental in quantum mechanics.
• It relating the energy of a photon to its frequency.

Last verified on 29-10-2026

Explanation

• James Chadwick is known for his discovery of the neutron in 1932.

Additional information:

• Proton: Protons were discovered by Ernest Rutherford, before neutrons.
• Electron: Electrons were discovered by J.J. Thomson, much earlier than protons or neutrons.
• Positron: A positron is the antiparticle of an electron, and it was discovered by Carl Anderson in 1932.

Last verified on 29-10-2026

Explanation

• Mass and Length are base quantities in SI units.
• Length SI Unit: meter (m)
• Mass SI Unit: kilogram (kg)

Additional information:

Base Quantities in SI System:

• Time (second)
• Electric current (ampere)
• Temperature (kelvin)

Last verified on 16-06-2026