Is a lava lamp radiation convection or conduction?
As the bulb heats up some of the heat from the bulb is transferred to the glass by radiation. Radiation occurs when heat is transferred between two objects that are not touching each other. (The bulb is not touching the glass.) As the glass heats up, some of its heat is transferred to the wax by conduction.
Where does thermal expansion occur in a lava lamp?
The base of lava lamps heats oil blobs submerged in a different liquid at the bottom of the lamp. Heating changes the density of the blobs and they rise towards the top of the lamp due to increasing Archimedes force.
Which scenario is thermal energy being transferred by radiation?
Heat transfer by radiation occurs when microwaves, infrared radiation, visible light, or another form of electromagnetic radiation is emitted or absorbed. An obvious example is the warming of the Earth by the Sun. A less obvious example is thermal radiation from the human body.
How does the lava lamp experiment work?
When enough bubbles pop, the water-and-remaining gas becomes more dense than the oil. So the ball of water sinks down through the oil and joins the rest of the water. Changes in density as gas is added to or taken away from water cause it to float up and sink down through the oil. Thus the lava lamp is created!
How does a lava lamp work?
In a liquid motion lamp, the heat usually comes from a light bulb. The heavier liquid absorbs the heat, and as it heats up, it expands. As it expands it becomes less dense. Because the liquids have very similar densities, the formerly heavier liquid is suddenly lighter than the other liquid, so it rises.