The purpose of choke in a fluorescent lamp is to MCQ with Answer and Explanation

Explanation:
E ∝ ν: higher frequency ⇒ higher photon energy. Gamma rays (high ν) more energetic than radio waves (low ν). Memory aid: 'E = hν; blue light photons more energetic than red'. Quantum physics relation frequently tested in competitive exams.

Explanation:
The fundamental law of conservation of momentum dictates that in a closed system with no external net forces, total linear momentum is always conserved regardless of the collision type. In an inelastic collision, some kinetic energy is converted into other forms of energy (like heat or sound or deformation work), meaning kinetic and total mechanical energy are explicitly NOT conserved.

Explanation:
When light crosses media, frequency remains constant as it's determined by the source. Speed and wavelength change proportionally: v = fλ, and v = c/n, so λ decreases in denser medium (glass). Amplitude may change due to reflection/transmission coefficients. Memory aid: 'Frequency is source-dependent; speed and wavelength are medium-dependent'. This fundamental wave property is frequently tested in refraction questions. Competitive exams often use this to assess understanding of wave behavior at interfaces. Always recall that color (frequency) doesn't change during refraction, though speed and wavelength do.