The scientist who proposed the electromagnetic theory of light was MCQ with Answer and Explanation

Explanation:
Thermal radiation is the transfer of heat via electromagnetic waves (primarily infrared). Unlike conduction (which requires physical contact) or convection (which requires fluid movement), radiation can travel through a vacuum. This is how the heat from the Sun reaches the Earth through the vacuum of space.

Explanation:
For uniform acceleration starting from rest, the displacement equation is s = ½at². Since displacement 's' is proportional to the square of time (t²), the displacement-time graph is a parabola curving upwards. A straight horizontal line on a v-t graph means constant velocity (zero acceleration).

Explanation:
Henri Becquerel discovered natural radioactivity in uranium salts (1896). Curie isolated radium, Rutherford classified rays.