Sodium lamp
No
No
There will be no interference because intensity of light reflected from mirror will be so great that it won't be visible and we will get uniform illumination.
The chemical element of atomic number 53, a non-metallic element forming black crystals and a violet vapour.
Iodine.
Water vapour is a compound. It is just water in a gaseous state.
Steam is the vapour phase of the compound called water.
no its just vapor of water if its mixed with another element then yes
Pure water vapor is a compound, just as liquid water is.
Vapour. Generally, 'gas' describes the state of a single element, whereas 'vapour' is used more commonly with compounds like acetone.
Sodium-vapour lamp, electric discharge lamp using ionized sodium,
Water vapor is only water,(H20=Hydrogen 2 parts, oxygen 1 part), which means that technically, water vapor is an element, but usually, it is just water...