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They make good mirrors because unlike plastic it isrigid and plastic gets scratched easily, but the matal doesn't.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoNot all smooth surfaces reflect it depends on material. If surface reflects it does it better when the surface is flat because light is not scattered on the surface.
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Do snails move faster on rough surfaces or smooth surfaces?
Snails move faster on rough objects as the sticky liquid they use for locomotion gets good friction and helps it to move. But on rough surfaces, the frictional force is much less and the snail can hardly move.
Why do modern mirrors reflect light better than the first mirrors?
Because metallic surfaces are good conductors of electricity. Light is a form of electromagnetic radiation and so interacts with a metallic surface in a way which it does not with an insulating surface like wood. The physics is moderately complex but the result is that an electromagnetic wave cannot penetrate a metal more than a very small distance before being bounced back out. Its also why a mobile phone won't work in a metal walled room - radio waves are also electromagnetic and just bounce of the walls. You will also find that other non-conducting materials, no matter how smooth or polished, do not reflect light as well as a polished metal surface. The only exception to this is total internal reflection where light passing from an optically dense material (such as glass) to a less dense material (such as air) will be totally reflected back into the glass if it is incident on the surface at an angle less than the critical angle
Why do suction cup stick to wet surfaces better than dry surfaces?
No. How well a suction cup sticks to a surface has to do with how will a seal can be formed on the surface. Rough surfaces will not form good seals compared to smooth surfaces which means that suction cups will not stick as well to rough surfaces as they do to smooth surfaces.
What are requisites of good grating?
you should get a good grater.
What type of surfaces are good radiators of heat?
Dull black surfaces they are also best at absorbing it as well. [Shiny and silvery or white surfaces are poor radiators and absorbers of heat. However they are very good in reflecting heat radiation.]
Do you need an adhesive for the gasket on a thermostat?
If both metal surfaces are really smooth and you have a good composite gasket then you may not need it. - If you have a good gasket goo available, it can't hurt. -My favorite is 'Permatex Aviation Form a Gasket' .
Why does a mirror need glass?
it doesn't. Any smooth, shinny surface will do. BUT the technology of glass mirrors is good, cheap, fast, and durable.
Do snails move faster on rough surfaces or smooth surfaces?
Snails move faster on rough objects as the sticky liquid they use for locomotion gets good friction and helps it to move. But on rough surfaces, the frictional force is much less and the snail can hardly move.
Why the street light refelector are convex in nature?
this is because convex surfaces , being curved outside, have a wider field area. Car rear view mirrors are also a good example of this. In these, convex mirrors are used. This is because, convex mirrors, being curved outside, have a wider field area and show the image of a larger area
Why don't rough shiny surfaces don't make good mirrors?
The angle of reflection and coherence of the light coming off a surface relies on the surface being smooth to keep the reflected photons returning at very close to the same pattern as it hits the mirror. A rough surface reflects the photons at many different angles - there is some reflection but in general it is so degrade we can barely see a reflection. The law of law of reflection says that for smooth surfaces, the angle of reflection is the same as the angle of incidence. If the light hits at many different angles, the light returned comes at many different angles; not a good thing for perceiving a reflection.
Why would water in a metal mug cool down so quickly?
Because metal is a good conductor of heat it absorbs heat from material touching its surfaces, and transfer to air.
What are the kinds of reflected light?
Generally Two types.Specular: Smooth surfaces direct reflected light at opposite angle. A mirror is a good example of specular reflection.Diffused: Rough surfaces scatter light in all directions. Matt white surfaces are examples.There are other surfaces that combine both types of reflection.(See the Sources and related links below for more information)
What are the kinds of light?
Generally Two types.Specular: Smooth surfaces direct reflected light at opposite angle. A mirror is a good example of specular reflection.Diffused: Rough surfaces scatter light in all directions. Matt white surfaces are examples.There are other surfaces that combine both types of reflection.(See the Sources and related links below for more information)
Did sumerian's have mirrors?
Yes, Sumerians did have mirrors, but I'm not sure if they were like the ones we use today. The metalworkers made cups, mirrors, jewelry, &c., and were pretty good at it. The mirrors were probably made of brass or something like it, but I'm not sure if the metal was the mirror or if they used glass. I'm sure they used silver and had the reflective stuff like we do today, so it's likely they had mirrors that were just less reflective.
Why do modern mirrors reflect light better than the first mirrors?
Because metallic surfaces are good conductors of electricity. Light is a form of electromagnetic radiation and so interacts with a metallic surface in a way which it does not with an insulating surface like wood. The physics is moderately complex but the result is that an electromagnetic wave cannot penetrate a metal more than a very small distance before being bounced back out. Its also why a mobile phone won't work in a metal walled room - radio waves are also electromagnetic and just bounce of the walls. You will also find that other non-conducting materials, no matter how smooth or polished, do not reflect light as well as a polished metal surface. The only exception to this is total internal reflection where light passing from an optically dense material (such as glass) to a less dense material (such as air) will be totally reflected back into the glass if it is incident on the surface at an angle less than the critical angle
How do you glue metal to rock?
You can glue most metals to rock surfaces. Make sure the rock is clean and free of dust, then use a good epoxy to attach your metal, support it till it sets.
What is good welding and bad welding?
a sound weld will have similar characteristics to the base metal. be free of cracks and fully fused to both surfaces and free of contamination.
