Chemical Engineering - Heat Transfer - Discussion
Discussion Forum : Heat Transfer - Section 1 (Q.No. 2)
2.
Heat waves
Discussion:
24 comments Page 1 of 3.
Rupesh said:
6 years ago
Heat radiation travels in a straight line at the speed of light. It will only travel through transparent media, like air, glass, water.
Sunlight reaches the earth atmosphere as it travels all along outer atmosphere which is in a vacuum.
Light is also a form of energy, if we concentrate light over substance at one point then it catches fire because of heat.
Sunlight reaches the earth atmosphere as it travels all along outer atmosphere which is in a vacuum.
Light is also a form of energy, if we concentrate light over substance at one point then it catches fire because of heat.
(1)
Deepesh said:
1 decade ago
Heat in the former of radiation pass through vacuum that's why heat energy comes from sun, also it is reflected by mirror that is the principle behind polished surface in vacuum flask interior and in the form of radiation heat waves pass in straight line but in conduction the path is defined by shape of the matter.
Tarak Nath Chaurasiya said:
5 years ago
Mirrors reflect light and light carries heat energy. Heat energy is also carried by non-visible radiation, particularly infra-red light. That too can be reflected by mirrors, but they are designed to reflect visible light best. Infrared rays are a form of heat that can be reflected by a mirror.
Troy said:
1 decade ago
"heat" can't travel through a vacuum, but light can. Heat transfer occurs by three mechanisms: conduction, convection and radiation (light, in other words). In a vacuum only the last of the three is possible. After all the sun heats the earth despite the vacuum in between the two bodies.
Pratap215 said:
1 decade ago
You see, light is a material in the general sense of the word (it's made of particles), but heat is a property (like color or momentum). Infrared radiation, which *transmits* heat, can indeed be reflected by metallic mirrors.
Gaurav kumar said:
1 decade ago
Dear friends heat wave can travel in vacuum (ex. Radiation). Heat waves traveling path depend on material.
Heat wave can not be reflective by mirror because it heat is a property not material like light which is reflective.
Heat wave can not be reflective by mirror because it heat is a property not material like light which is reflective.
Nirav Der said:
8 years ago
After some researches, its seems like heat can pass through the vacuum as well. The example we can take that the heat waves are coming on the earth by vacuum. And the vacuum is in between the two bodies like earth and sun!
Zhuky said:
6 years ago
@All.
Please read the question again, the answer excluded "A" because it says "can not". If there is " can" only in the answer, option "D" would have been "All". Heat can travel through a vacuum.
Please read the question again, the answer excluded "A" because it says "can not". If there is " can" only in the answer, option "D" would have been "All". Heat can travel through a vacuum.
Vivek said:
6 years ago
1. Heat transfer can be occurred by 3 ways convection, conduction, radiation. In a vacuum, heat can be transfer through radiation.
2. Glass is a bad conductor of heat.
2. Glass is a bad conductor of heat.
PRIYA said:
4 years ago
According to my view, the answer is incorrect.
Heat can travel in any directions, only for a derivative point of view we are considering it as unidirectional flow.
Heat can travel in any directions, only for a derivative point of view we are considering it as unidirectional flow.
(3)
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