A concave mirror forms a real, inverted, magnified image when object is MCQ with Answer and Explanation

Explanation:
In solids, heat flows by conduction (lattice vibrations and free electrons). Metals are good conductors due to free electrons. Convection in fluids, radiation no medium.

Explanation:
RADAR uses microwaves (short wavelength radio waves). Often classified as microwaves.

Explanation:
Diamonds are cut in such a way that light entering them hits multiple facets from the inside at an angle greater than the critical angle (which is very low for diamond, around 24.4°). This results in multiple total internal reflections, trapping light and forcing it out of specific faces, creating a brilliant sparkle.