Which one of the following is more coherent?

مندرجہ ذیل میں سے کون سا زیادہ مربوط ہے؟

X-rays

Laser

Normal light

None of these

Coherence refers to the phase consistency of a wave over time and space.

Laser light is highly coherent because it emits waves that are monochromatic, in phase, and travel in the same direction.