Physics
Why does'nt the hydrogen atom emit X-rays?

Its energy levels are very close to each other
It is very small in size
It has only one electron
It is highly electropositive

ANSWER DOWNLOAD EXAMIANS APP

Physics
Rainbow is due to

diffusion of sunlight through water droplets
refraction and reflection of sunlight by water droplets
ionisation of water deposits
absorption of sunlight in minute water droplets

ANSWER DOWNLOAD EXAMIANS APP