Photon a has twice the energy of photon b.
is the momentum of a less than, equal to, or greater than that of b?
less equal greater is the wavelength of a less than, equal to, or greater than that of b?
less
greater
equal

Explanation:

Given

Photon A has  twice the Energy of Photon B

i.e.

de Broglie wavelength is given by

and Energy of Proton is given by

where P=momentum

c=velocity of Light

Momentum of A

Momentum of B is

Thus

For wavelength

since therefore

b.a device that inputs heat into a cool object

answer///terminator or twilight zone;