Tag: spectra

Wave length of visible spectrum extends from

Photons of an electromagneitc radiation has an energy $11keV$ each. To which region of electromagnetic spectrum does it belong?

In which colour an yellow coloured dress would appear when viewed through a blue filter?

The velocity of light is $3.0 \times {10^8}m{s^{ - 1}}$. Which value is closest to the wavelength in nanometres of a quantum of light with frequency of $8 \times {10^{15}}{s^{ - 1}}$?

Which of the following represents an infra-red wavelength?

An ultrasound equipment work at frequency:

Select the correct statement from the following

A standard radio broadcasting station has an assigned frequency between $535$ and $1605\ kHz$. The VHF(very high frequency) television stations (channels $2$ to $13$) have frequencies between $54$ and $216\ MHz$, while the UHF (u=ultra) stations (channels $14$ to $83$) have frequencies between $470$ and $890\ MHz$. What is the wavelength corresponding to each of the frequencies mentioned?

One requires 2 IeV of energy to dissociate a carbon molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dis-acceleration lines is 

Which one of the following is not a electromagnetic waves?