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Why does the brightness of the light of a flashlight decrease as it moves farther away from you?
Wiki User
∙ 13y ago
because light acts as a wave and is subject to the inverse square law. when it travels further it spreads out further covering but still only has as much energy as it had when it left the source. basically what that means is when light travels twice a certain distance it has to cover 4 times a much area so that original energy is spread out over more area.
A good way to conceptualize this is imagine you drop a a rock in water. the waves created by the rock don't continue on forever, they get smaller until they fizzle out all together.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoConsider a light bulb that radiates in all directions evenly. There will be a constant amount of light passing through the surface of the bulb each second. This is called the flux. At any distance r away from the bulb then the same amount of light has to pass through a sphere around the bulb of radius r. Since the surface area of a sphere varies as r^2, the light intensity drops as 1/r^2.
Wiki User
∙ 13y agoBecause the constant amount of light that the flashlight produces is spread out
over a larger area when it's farther away, so the intensity at every point is less.
Wiki User
∙ 14y agoBecause the farther it is the bigger surface it covers since the light moves in an increasing surface motion ... and when surface is bigger, the intensity decrease
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Why does the brightness of the light emitted by a flashlight decrease as the flashlight moves farther away from you?
Because the constant amount of light that the flashlight produces is spread outover a larger area when it's farther away, so the intensity at every point is less. The flashlight might attack you, so be careful. Also, if your earlobes are out of control, tape them down. Please.The torch light penetrate each so much light is not parallel, with the light propagation distance become far, spacing between the light light is more and more big, making smaller according to the density of light in the distance.
Why the intensity of the light in a flashlight beam decreases as the flashlight moves farther away?
Because the constant amount of light that the flashlight produces is spread out over a larger area when it's farther away, so the intensity at every point is less. Light decreases inversely to the square of the distance.
What is brightness as sound is to light?
Loudness is to brightness as sound is to light.
What is the output in the system of a flashlight?
The output of a flashlight is its light
How energy is transformed light from flashlight?
Battery electric energy is converted to light energy of flashlight.
Why does the brightness of the light emitted by a flashlight decrease as the flashlight moves farther away from you?
Because the constant amount of light that the flashlight produces is spread outover a larger area when it's farther away, so the intensity at every point is less. The flashlight might attack you, so be careful. Also, if your earlobes are out of control, tape them down. Please.The torch light penetrate each so much light is not parallel, with the light propagation distance become far, spacing between the light light is more and more big, making smaller according to the density of light in the distance.
Why does the Brightness of the Light Emitted by a Flashlight Decreases as the Flashlight moves farther away from you?
Because the constant amount of light that the flashlight produces is spread outover a larger area when it's farther away, so the intensity at every point is less. The flashlight might attack you, so be careful. Also, if your earlobes are out of control, tape them down. Please.The torch light penetrate each so much light is not parallel, with the light propagation distance become far, spacing between the light light is more and more big, making smaller according to the density of light in the distance.
Why the intensity of the light in a flashlight beam decreases as the flashlight moves farther away?
Because the constant amount of light that the flashlight produces is spread out over a larger area when it's farther away, so the intensity at every point is less. Light decreases inversely to the square of the distance.
Why can a lazer light go farther than a flashlight?
Because The Miz said so.
Which circuit can decrease the fluorescent brightness to the minimum amount?
You need to purchase a Fluorescent dimmer switch, no circuit can dim the brightness of the light safely.
What is the relationship with brightness and distance with stars?
Other things being equal, if a star is farther away, it will look less bright. This is the same with any light - if you move farther away from the light, it looks less bright.
How does the moon get its own light?
If you took a round object liken unto a basketball and sat in a dark room, would the basketball give out light. correct. the answer is no. If you took the same basketball and sat in a room and held a flashlight under the basketball, would the basketball give out light on the other side. correct. the answer is no. now, if you took the flashlight and held it above the basketball approxmiately 6 inches above, does the basketball now have light. and the farther away you hold the flashlight above the basketball the more light will shine upon the flashlight. Question. Where did the flashlight get its light from. correct. the flashlight. the moon gets it light from the sun. The moon reflects the light that is provided from the sun and the basketball reflects the light that is provided from the flashlight.
How does closing the iris diaphragm affect image brightness and contrast?
An iris diaphragm controls the amount of light admitted to a lens. Closing the iris diaphragm will decrease the brightness and increase the contrast of an image.
What is brightness as sound is to light?
Loudness is to brightness as sound is to light.
What is the most efficient light emitting diode to use in a flashlight right now in terms of high brightness?
I can't give you a for-sure answer, but Cree LEDs are some of the most efficient out there.
Does the distance of the sun affect the power of solar energy?
yes, just like as a flashlight moves farther away, the light becomes dimmer and less bright
Which is the brighter - the light coming in or the light from the flashlight?
Sun light is more brighter than the light from flashlight in house.
