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.
The element that fits this description is iodine. In its vapor phase, iodine exists as diatomic molecules (I2) and displays a distinctive purple color.
Water vapor is a pure substance, as it consists of individual water molecules. It is not a mixture, compound, or element.
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.
In the gaseous state, acetone is considered a gas. The term "vapor" is typically used to describe the gaseous state of substances that are normally in a solid or liquid state at room temperature, while "gas" refers to substances that are typically gaseous at room temperature.
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...