Tag: physics

wavelength of following lights are:
$\gamma$-rays:$10pm$
x-rays:($10pm-10nm$)
UV-rays:($10nm-380nm$)
visible rays:($380nm-750nm$)
so,visible rays has maximum wavelength.

We know that radiation is emission or transmission of energy in the form of waves or particles.

Infrared radiation are used in microwaves ovens in electronagnetiic spectrum frequency and energy of microwave is smaller than visible light water contain is required for coobing food in microwave oven almost all food item contain some water contain.Microwaves interact with water molecules all atoms via their electric and magnetic fileds. Temprature of water molecules increases by this these water molecule share this energy with neighbouring food molecules, heating up the food.

Hydrogen is the least energetic element. Even the most energetic line that hydrogen emits (when an electron drops down from the second shell to the first) has only enough energy to be an ultraviolet photon. This is because the energy levels in hydrogen atom are very close. So hydrogen atoms do not emit X rays.

X-rays are produced by bombarding a metal target with high energy electrons.

Frequency of Radio waves = $<3\times { 10 }^{ 9 }$Hz

The working of microwave oven involves absorption of microwaves by matter.

$X$-Rays Wavelength range $=1\times { 10 }^{ -11 }m$ to $3\times { 10 }^{ -8 }m$
So,                          $=0.001 nm$ to $1 nm$

X-rays are electromagnetic waves with a wavelength less than about $10^{-9}$m. Cathode rays comprise of a beam of electrons. $\alpha$-rays are made up of helium nucleus(i.e., $^{4} _{2}He^{2+}$), hence are made up of positively charged particles, whereas $\beta$-rays are made up of energetic electrons, hence comprise of negatively charged particles.