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What is a device that contains vanes that move when exposed to light?
Wiki User
∙ 11y ago
radiometer
Wiki User
∙ 11y ago
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Why does sunlight make the vanes in a 'light mill' radiometer spin?
A radiometer has vanes that are black on one side and white or silver on the other. There are two types of these devices, one containing rarefied (low-density) gas and one "containing" a total (or nearly total) vacuum. Both operate under different principles. In the device containing rarefied gas, light is absorbed by the black sides, which get a little warmer than the lighter sides. The temperature differential causes the gas molecules around the paddles to agitate and provide thrust to the paddles. If there is too little gas in the bulb, the vanes won't rotate because there aren't enough gas molecules to produce thrust. If there is too much gas, the vanes won't rotate because there is too much resistance (from the gas itself) for the thrust to overcome. In the other device containing a vacuum, the difference in radiation pressure between the two sides causes the vanes to spin.
What are the sticky out bits on a wind turbine called?
Vanes...
Why does a radiometer spin when a light is flashed on it?
The shiny side of the vanes reflects the heat from the light, while the black side absorbs it. As it absorbs the light and heat, it also heats the air molecules near it. This cause the air molecules to exert a tiny bit of pressure on the flags, enough to make them spin.
Who uses a wind vane?
To see from wich way the wind is blowing. eg: if the arrow points to the east= wind comes comes from the east.
What are the disadvantages of a reflecting periscope?
The main disadvantage is that it does not have the advantages of a prism periscope. 1) Glass prisms do not produce multiple reflections 2) Glass prisms do not have exposed silvered surfaces which can be damaged 3) Depending on your arranges, if not the image will not be inverted.
Device used for indicating the direction of the wind?
Wind vanes or wind socks.
What is a Vertex for measuring the height of a jump?
The vertec is a measuring device used to measure vertical jump height. It is a jump testing device that is constructed of steel and has horizontal vanes that are spaced one-inch apart in increments. The vanes can be adjusted from six feet to 12 feet.
Why does sunlight make the vanes in a 'light mill' radiometer spin?
A radiometer has vanes that are black on one side and white or silver on the other. There are two types of these devices, one containing rarefied (low-density) gas and one "containing" a total (or nearly total) vacuum. Both operate under different principles. In the device containing rarefied gas, light is absorbed by the black sides, which get a little warmer than the lighter sides. The temperature differential causes the gas molecules around the paddles to agitate and provide thrust to the paddles. If there is too little gas in the bulb, the vanes won't rotate because there aren't enough gas molecules to produce thrust. If there is too much gas, the vanes won't rotate because there is too much resistance (from the gas itself) for the thrust to overcome. In the other device containing a vacuum, the difference in radiation pressure between the two sides causes the vanes to spin.
What color are your vanes in your body?
The color of your vane is maroon due to the way the light hits your vane.
How many vanes are in a body?
There are a lot of vanes in a human body. Everywhere you look on your body there probably will be vanes
What are different types of vanes used in centrifugal pump?
there are three major types vanes are used for a centrifugal pumps those are 1.forward curved vanes 2.backward curved vanes 3.flat vanes
Do airports have wind vanes?
Weather vanes, or wind vanes measure the direction of the wind. Airports generally have high tech instruments to measure the weather as opposed to regular weather vanes.
What is the weather vane collective noun?
There is no standard collective noun for weather vanes, most likely because weather vanes are seldom found in groups.However, a place that sells weather vanes might have a display of weather vanes or someone who loves all types of weather vanes might have a collection of weather vanes.
In a Radiometer which vane absorb the most light energy?
you have a force field that the first vane you can tell it
What is a sentence using the word vanes?
The weather vanes spun crazily. The bomb had vanes to make sure it landed nose first.
What is a structure called with revolving vanes?
A windmill is an example of a structure with revolving vanes.
When was Vanes Martirosyan born?
Vanes Martirosyan was born on 1986-05-01.
