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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 else can I help you with?
What effect does the light source have on a radiometer?
The light source heats the radiometer's vanes, causing them to rotate due to the pressure difference on either side of the vanes. The intensity and angle of the light can affect the speed and direction of rotation. A stronger light source can lead to faster rotation, while different wavelengths of light may also impact the radiometer's movement.
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.
This reaction requires direct energy of the sunlight to make energy carrier molecules?
The process described is photosynthesis, which occurs in plants and some bacteria. Photosynthesis uses sunlight to convert carbon dioxide and water into glucose (energy carrier) and oxygen. The energy from sunlight is captured by chlorophyll in plant cells and used to drive this chemical reaction.
The light from the sun is called?
Ah, what a wonderful question! The light from the sun is called sunlight. It brings warmth and brightness to our world, filling it with beautiful colors and shadows. Just like how adding a touch of yellow to your painting can make it come alive, sunlight brings life and energy to everything it touches.
Can a leaf reflect light?
Yes, a leaf can reflect light. The glossy surface of some leaves allows them to reflect sunlight, which can make them appear shiny or vibrant in color.
What effect does the light source have on a radiometer?
The light source heats the radiometer's vanes, causing them to rotate due to the pressure difference on either side of the vanes. The intensity and angle of the light can affect the speed and direction of rotation. A stronger light source can lead to faster rotation, while different wavelengths of light may also impact the radiometer's movement.
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.
Why does a radiometer spin when a light is flashed on?
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.
What is a sentence using the word vanes?
The weather vanes spun crazily. The bomb had vanes to make sure it landed nose first.
A reaction that requires direct energy of sunlight to make energy of sunlight to make energy carrier molecules?
light
What is needed to make photosynthesis reaction go?
sunlight
What does earth do with sunlight from the sun?
Sunlight warms the earth, provides light for us to see, and light so that plants and other photosynthetic organisms can use the energy to make food.
How plants make food without the aid sunlight?
They cannot make so. They obtain energy from light
What is the effect of sunlight vs fluorescent light on a black bean plant?
Sunlight should make it grow. Flourescent wont do anything.
Is sun light a monochromatic light?
No, sunlight is not monochromatic light. It is composed of a wide range of wavelengths that make up the visible spectrum, from violet to red. This gives sunlight its characteristic white color when combined.
Does the moons produce light?
No, the moon reflects the suns light to make it shine
Does chlorophyll trap glucose from sunlight?
No, chlorophyll does not trap glucose from sunlight. Chlorophyll is a pigment found in chloroplasts that absorbs light energy for photosynthesis. During photosynthesis, chlorophyll captures light energy and converts it into chemical energy in the form of glucose, not by trapping existing glucose from sunlight.
