Specific heat capacity of water is 1 cal/g°C. Heat required to raise temperature of 200 g water from 25°C to 35°C is MCQ with Answer and Explanation

Explanation:
Parallel-faced slab: refraction at entry and exit cancel angular deviation, but ray shifts laterally. No net direction change. Memory tip: 'Slab: parallel emergent ray; Prism: deviated emergent ray'. Ray optics concept frequently tested in competitive exams.

Explanation:
Gamma rays are EM waves, no mass/charge, highly penetrating, least ionising. Alpha has highest ionising power.

Explanation:
Dispersion: red has longest wavelength, lowest refractive index, deviates least. Violet deviates most. So spectrum: red at top (least deviation), violet at bottom.