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∙ 15y agoyes.
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Light beam dimmer is chemical or physical change?
A beam of light becoming dimmer is a physical change since it is reversible. Recharging its source will make the light beam bright again.
What are five clues you would consider before diciding whether a change you observe is physical or chemical?
The 5 clues to a chemical change are:energy (heat or light) is given off, or heat is absorbedthere is a precipitate (which means a solid has formed at the bottom of a solution)the change is hard to reverse or irreversiblethere are bubbles which means a gas is being releasedthe solution turns a different colourTo be 100% certain that it is a chemical change, at least 2 or 3 of these things must happen.
What is the difference between a ohysical change and a chemical change?
A Physical Change is a change in the form of either gas, liquid, or solid while a chemical change is a change that occurs in the molecule such as the the burning of methane: CH4+2O2-->CO2+2H2O. Indicators of a Chemical reaction are: Heat, Light, pH, Color, Smell, ect. While Physical will be like ice melting into water or water being boiled into steam.
Is production of heat or light physical or chemical change?
i think it would be physical because it is still energy.
Is giving off light a physical or chemical change?
I would think it to be a Physical Change. Not chemical.
Can heat light or a change in odor indicate a physical change?
Gay
Can Heat light or change in odor can indicate a physical change?
Gay
Is heat light and change in odor indicate a physical change?
No. Change in odour is likely to be related to a chemical process.
What is it called when color appears to change with light?
It might be called photo-chromatic aberration.
Is switching a light bulb on a physical or chemical change?
Physical change
Is a light bulb on a chemical or physical change?
Physical change
The color of a substance is a physical property?
physical property, because physical properties can be observed without changing the substance; chemical properties must undergo a chemical change to observe it's chemical potentialColor can be most easily understood at the reflection of light off a material that is recognised by the chemical changes it causes to the rods and cones of a person's eyes.......Light or (or photon) is energy that we perceive with our eyes just as heat is energy you perceive as heat. The range of energy that we can perceive with our eyes is called the "visible range" and can often be seen in the rainbow. The difference between the infrared energy and the visible light energy is the frequency.......If we take a prism and pass white light through it we see the colors of light. the prism has caused a (Refraction) physical change in the white light and separated it into the various frequencies that cause different chemical changes in our eyes that our brains identify as colors.......An object such as the fruit we know as an orange has a skin that our eyes perceive as orange in color because the same white light hits the orange and only the reflected frequencies that impact our eyes are those that cause the chemical changes that our brains identify as the orange color.......With this understanding of how we perceive color we should be able to answer is color a chemical or physical property of matter.......Given that a change in color is fundamentally the change in the ability to physically change what frequencies of light are reflected back to, and perceived by the eye.......This has nothing to do with what caused the change in reflectivity and further suggests that color is an indicator rather that an actual property of matter when discussing the nitty gritty of things
Three physical changes and three chemicl changes?
Three clues of chemical change : a gas , light, solid, color. JoJo
Is the production of light a chemical or physical change?
physical
What are the physical properties of the moon?
The color like its light brown color or the size of it.
Does a physical change emit light?
Yes, for example solar cells produce electricity (physical change) which can then be converted to light energy.
How is a rainbow a physical change?
A true change in color is almost always associated with a chemical change.Here are a few examples of visual changes that are not color changes due to physical change.Chemical change: When your toast changes from white to brown, the heat of the toaster has caused a chemical change in the outer layer of the toast.Physical Change: When rain changes to snow, we have the impression that it appears different. Water appears transparent and snow appears white, but the difference is really a difference of how light is scatters from snow. (A white color normally means diffuse reflection.)Chemical Change: Photochromic eyeglasses are normal transparent glasses which darken when exposed to sunlight. This is an example of reversible chemical change induced by light.Physical Change: A rainbow will appear when water droplets form in air and this can provide a dramatic color appearance. In fact, the color is again not the color of the droplet but the way diffraction splits the light into different colors as seen by the observer.A physical change that is associated with a true change in actual color (not a change in light scattering) is quite exotic and no good example of such a change has been given in this answer.
