but then what has light to do with warmth...?

Question

In my last question you've all answered something similar to'the area the light isn't on would be cooler.'But then again, light is another form of energy as warmth. And although they get combined quite a lot, that wouldn't explain why the shadows aren't warm, just why they're dark...

Answer 1

Now we're talking about heat conduction. This is how two areas of two different temperatures would gradually come to an equilibrium to each other minus any additional energy flows.

There are three basic mechanisms. The least efficient is radiation. This is where the hotter object actually emits (typically) infrared radiation, lowering its average energy content and cooling it.

The next mechanism is convection. This is best demonstrated by the wind flowing past you. While your sweat is evaporated by the wind, the energy is transferred to the air flowing by you and taken away from you.

The last mechanism is conduction. This is where heat energy is carried by electrons in a metal or other conductive material. This is why an iron rod that is held in a fire will soon get hot enough at the end not in the fire to become painful.

We are also looking at relative temperatures here. An area in shadow may be "warm" as defined by a thermometer but it will feel "cooler" than an area not in shadow.

Answer 2

Light is just the visible spectrum of energy. All energy is waves (let's stick to the classical physics here and forget about quanta, strings etc.) Heat therefore, is just energy that you can't see. The sun emits heat and light. Now, in the shade (or shadow) the light can't get through because something is blocking it (if you're sitting under a tree, for example, the leaves of the tree are blocking the light) That tree is also blocking the heat from getting through. The only heat the area under the shadow receives is the dissipated energy from around it. Hence, it's cooler in the shade but not cold either.

Answer 3

none. warmth is heat, a form of energy found on all things, nothing is on absolute zero temperature, every object vibrates or spin, and in a sense, movement is present, heat is present, the only difference is the amount of heat on objects varies.

now, energy transforms from one form to another, in a sense again, there is movement! heat is energy where it is the best form of energy capable of jumping from one object to another by means of this - it conducts, convects, and best of all, it radiates.

Radiations is the best carrier of heat because it can travel tru vacuum, it can reach anywhere in the universe! via empty space!

Now Electromagnetic wave is wave-energy and particle-energy that carries both heat and the visible light energy in its spectrum, do not be confused, heat is everywhere, it's like, it's the most basic form of energy, so all objects has it, and so light has it! The electromagnetic spectrum carries heat with it tru radiation.

Now it all depends on the tuning of objects on what rate can they absorb (and release) heat tru conduction, convection, or radiation.

Just like in music, two strings will vibrate when in the same frequency even if only one has been struck to vibrate, the other one will absorb the energy released by the first string, travel tru air as sound waves (an energy form also) then will struck the second string, since they have the same frequency, it is easier for the sound energy to be absorb by the 2nd string.

same in heat, absorption depends on the tuning (the frequency) of object to object, and the tuning of heat itself. Imagine the heat energy gamma rays possessed versus infrared ones!!

and also, just remember, heat transfer follows the laws of thermodynamics. (the flow is from a higher energy first object to a lower energy second object, and cannot be the other way.)

do not let a led light hit the palm of your hand and see whether you'll feel that your palm is warming after sometime, if your palm is already warmer that the led light, it is not possible already based on the laws of thermodynamics.

good day.

Answer 4

Here's the deal.

A shadow is where there is no light. That means no light energy is hitting it... therefore it will be cooler in a shadow as compared to being in the light.

Dark colors are "warmer" than light colors because they absorb all the colors of the spectrum. You still have to shine a light on it for it to absorb light.

So if you think about it. A dark piece of cloth will be warmer in the light than in the shadow. The same will be true for a piece of light cloth.

Answer 5

You'll need to learn some physics before this will make sense to you.

Take a pile of objects at the same temperature and expose them to the night sky. Other factors equal, the darker objects will radiate more heat and become cooler.

Take a pile of objects at the same temperature and expose them to sunlight. The darker objects will radiate more heat. But they will also absorb much more heat. The net effect is that they will absorb more heat than lighter objects.

The amount of heat they absorb also depends on the amount of sunlight they receive. Shade means they receive less sunlight.

Sunlight, an electromagnetic wave, transports energy from the sun to the object. The dark object absorbs most of it. The light one reflects most of it.

Answer 6

Hi James, I have seem my shadow in the light of the day,and it's warm.In the dark,your shadow will be cold,and dark.Their dark,because the light isn't shinning in the dark.You need light to show,and warm is light,so shadows are warm in the light. Is that right,I am confusing myself,I think it's right.

Clowmy

Answer 7

Shade is never warm. No Sun or light.
I learned that in grade 4

Answer 8

when u absorb light or any form of enery it is tranformed into heat....