Do you agree or disagree with either or both of the students

Do you agree or disagree with either or both of the students?

Explain please.

Student 1: I think that all you need to do to get signs to give off light of different colors is to use tinted glass of different colors. If you electrify a gas, white light is emitted so the color of glass gives the sign its color.

Student 2: That can\'t be it because the electrons will always move between the same energy levels for atoms in a neon sign and so they will mostly give off red light. I think the yellow sign is filled with a different type of atoms with energy levels that are further apart so when the electrons drop down from a higher energy level to a lower energy level the atoms will give off yellow light instead of red light.

Solution

Student-1 : It is not true for all gases that white light is emitted when a gas is electrified, because atoms and molecules can exist only in certain specific energy states, the energy emitted by the excited molecule is limited to differences between these states. Only certain energies of light are emitted. where as white light is a mix of all colors . mercury vapour emits white light as the combination of primary colours , so electrifying any gas will not emit all colours. (white light).

Student-2 : The electron move between same orbits untill a constant excitation energy is supplied , it is possible that electrons can jump to higher energy level in the same atoms and give different color and the glow is determined by the energy difference of levels . The energy of the light is related to its wavelength by the equation E = hc/, where is the wavelength, h is Planck\'s constant (6.63 × 10^-34 J sec), and c is the speed of light (3.00 × 10⁸ m/sec).

Student-2 is correct saying that different type of atoms with energy levels emit different colours.

Student-1 is partially true , because mercury lamp gives white light which can used with tinted glass to make sign.