Question

Which is correct?

A. A photon from bright blue light has more energy than a photon from dim blue light.

B. Microwaves have higher energy than blue light. That is why microwaves are used to cook food and blue light is not.

C. Blue light, microwave radiation and x-ray are essentially identical. The only real difference is their wavelengths, frequencies and energies.

D. A photon from a 1000 watt microwave oven has more energy than a photon from a 100 watt light bulb.

E. Two of these answers are correct

Answer 1

The energy of a photon depends only upon the frequency of the photon, not the intensity of the source. Hence a photon from dim source has same energy as a photon from bright source with same wavelength or frequency. First option is not correct.

Microwave has greater wavelength than light waves hence it has less energy. Second option is not correct.

Option C is correct.

Light wave has greater energy than microwave, hence D is not correct.

only Option c is correct.