Q.A car is left in sunlight with all its windows closed on a hot day. After some time it is observed that the inside of the car is warmer than outside air. Why?

Glass is diathermanous to the Sun's radiation, which (from a ~5800 K source) is mostly short-wavelength visible light — so sunlight passes through the windows and is absorbed by the seats and interior. …

Glass is diathermanous to the Sun's radiation, which (from a ~5800 K source) is mostly short-wavelength visible light — so sunlight passes through the windows and is absorbed by the seats and interior. The warm interior re-radiates at much longer (infrared) wavelengths, for which glass is athermanous — this radiation cannot get back out. Energy keeps entering but barely leaves, so the insid …

Answer from the section this box belongs to (§3.12.1 of the Balbharati Std-XII Physics textbook) — recall the definit …

Answering from memory of a different grade's phrasing — use this chapter's own definitions and keep th …