The power of accommodation of the eye is due to MCQ with Answer and Explanation

Explanation:
A rocket works on the principle of conservation of linear momentum. As the exhaust gases are expelled downward at high velocity, they carry downward momentum. To conserve the total momentum of the system (which is initially zero), the rocket must acquire an equal and opposite (upward) momentum, propelling it forward.

Explanation:
Violet ~400 nm, shortest in visible. Red ~700 nm, longest. Order VIBGYOR. Shorter wavelength higher frequency, more energy. Ultraviolet beyond violet.

Explanation:
Solar cell (photovoltaic cell) converts sunlight directly into electricity using semiconductor p-n junction. No heat involved. Battery converts chemical to electrical. Thermocouple heat to electrical. Solar energy is renewable.