Land breeze blows at night because MCQ with Answer and Explanation

Explanation:
High c = absorbs/releases large heat with small ΔT. Stabilizes engine temperatures and organism body temperatures. Memory tip: 'High specific heat = thermal buffer; water moderates climate and physiology'. Property application frequently tested in competitive exams.

Explanation:
Dispersion occurs because refractive index of glass varies with wavelength (color): n ∝ 1/λ approximately. Since v = c/n, different colors travel at different speeds in glass, causing different refraction angles (Snell's law). Frequency remains constant across media; wavelength changes. Option B is true but not the direct cause; speed difference causes angle difference. Memory tip: 'VIBGYOR: Violet bends most (slowest in glass), red least'. This conceptual question tests understanding of dispersion mechanism, crucial for optics in competitive exams. Always distinguish cause (speed variation) from property (frequency/wavelength).

Explanation:
Law of reflection: angle of incidence = angle of reflection, both measured from normal. So 30°. If angle with mirror is given, convert to normal. Always equal for smooth surfaces.