IS IT POSSIBLE TO HAVE LIGHTENING WITHOUT THUNDER?

<div dir="ltr" style="text-align: left;" trbidi="on"> <div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjbDaWnDZ6_NABUmTAgGNhFkEYodstoxkLqiP9mX3Tnxl5KNss20MOQk6001QVOKWG3oHASKCBKoe90A-dyRZJSVnvXatSLUZgOsUF7xdX0mva24ThqBO3gao1RmiSMmrPBC5nGLuLOEUI/s1600/tmp_Lightening-Srike1366060865.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjbDaWnDZ6_NABUmTAgGNhFkEYodstoxkLqiP9mX3Tnxl5KNss20MOQk6001QVOKWG3oHASKCBKoe90A-dyRZJSVnvXatSLUZgOsUF7xdX0mva24ThqBO3gao1RmiSMmrPBC5nGLuLOEUI/s1600/tmp_Lightening-Srike1366060865.jpg" /></a></div> Heat lightning is the name used for the faint flashes of lightning on the horizon or other clouds from distant thunderstorms that do not have accompanying sounds of thunder. This happens because the lightning occurs very far away and the sound dissipates before it reaches the observer.<br /> <br />  [1] The term is a little misleading because it has nothing to do with the heat of the lightning itself. At night, it is possible to see the flashes of lightning from very far distances, up to 100 miles, but the sound doesn't carry that far.<br /> <br />  [2]Lightning results from the discharge of negative ions created from the friction of ice and water particles bumping into each other at the bottom of a cloud. Heat lightning can be an early warning sign that thunderstorms are approaching. In Florida, heat lightning is often seen out over the water at night, the remnants of storms that formed during the day along a sea breeze front coming in from the opposite coast. Heat lightning is not to be confused with electrically-induced luminosity actually generated at mesospheric altitudes above thunderstorm systems (and likewise visible at exceedingly great ranges), a phenomenon known as "sprites ". Atmosphere The movement of sound in the atmosphere depends on the properties of the air, such as temperature and density. Because temperature and density change with height, the sound of thunder is refracted through the troposphere . This refraction results in spaces through which the thunder does not propagate. The sound of thunder often reflects off the Earth's surface. The rumbling sound is partly due to these reflections. This reflection and refraction leaves voids where thunder cannot be heard.<br /> <br />  Curvature:<br /> The Earth's curvature also contributes to distant observers not hearing the thunderclap. Thunder is more likely to be bounced off the Earth's surface before it reaches an observer far from the strike, and only the right refraction and reflection of the sound off of the atmosphere will give it range it needs to be heard far away. The reflection and refraction in the troposphere determines who hears the strike and who doesn't. More often than not, the troposphere will reflect the light, and leave out the sound - in these cases some fraction of the light emanating from distant thunderstorms (whose distant clouds may be so low to the horizon as to be essentially invisible) is scattered by the upper atmosphere and thus visible to remote observers.<br /> Under optimum conditions, the most intense thunderstorms can be seen at up to 100 miles (161 km) over flat terrain or water when the clouds are illuminated by large lightning discharges. However, an upper limit of 30–50 miles (48–80 km) is more common due to topography, trees on the horizon, low to mid level clouds, and the fact that local visibilities are generally no more than 25 miles (40 km).<br /> <br />  Variability of anvil height (an anvil is the large, plume-like top of a thunderhead) also contributes—45,000 feet (13,715 m) is very common in the mid latitudes for warm season thunderstorms, but the anvil height can range from 35,000 feet (10,665 m) to a current record of 78,000 feet (23,770 m). Silent lightning: Silent lightning also occurs where airborne matter muffles the thunder, such as heavy snow in winter storms ( thundersnow) and dust and sand storms . In some instances, heavy falling snow has silenced thunder from cloud to ground lightning strikes as close as one to two miles (1.6 to 3.2 km) from the observer and severe dust storms are even more effective in many cases.</div>

IS IT POSSIBLE TO HAVE LIGHTENING WITHOUT THUNDER?

Heat lightning is the name used for the faint flashes of lightning on the horizon or other clouds from distant thunderstorms that do not ...

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EVER WONDERED WHY WE FEEL COLDER ON THE TILES THAN ON CARPET

<div dir="ltr" style="text-align: left;" trbidi="on"> <span style="background-color: white; color: #141823; font-family: Helvetica, Arial, 'lucida grande', tahoma, verdana, arial, sans-serif; font-size: 14px; line-height: 20px;">The perception of "cold" is due to your nerve cells. If an object is giving heat energy to your skin, you feel warmth. If it is taking away heat energy, you feel cold.</span><br /> <br style="background-color: white; color: #141823; font-family: Helvetica, Arial, 'lucida grande', tahoma, verdana, arial, sans-serif; font-size: 14px; line-height: 20px;" /> <span style="background-color: white; color: #141823; font-family: Helvetica, Arial, 'lucida grande', tahoma, verdana, arial, sans-serif; font-size: 14px; line-height: 20px;">The answer in brief is:</span><br /> <span style="background-color: white; color: #141823; font-family: Helvetica, Arial, 'lucida grande', tahoma, verdana, arial, sans-serif; font-size: 14px; line-height: 20px;">the carpet has more insulation; the tile has greater heat conductance with your foot; and the tile has better conduction of hea</span><span class="text_exposed_show" style="background-color: white; color: #141823; display: inline; font-family: Helvetica, Arial, 'lucida grande', tahoma, verdana, arial, sans-serif; font-size: 14px; line-height: 20px;">t away from your foot. Carpet is composed of fibres which trap air, creating I insulating layers. This is the same process whereby clothes (for example a woollen vest) trap your own body heat to warm you just as I told u early in of my facts.<br /><br />So the carpet is sort of composed partly of fibres and partly of air. Air is much, much easier to heat than stone, tile, or metal. So the same amount of heat energy will cause a greater increase in the temperature of a carpet than of a tile. When you place your bare foot on the floor, the heat is drawn away from your body via thermal conductance, through the points of contact with the floor.<br />The smoother the surface, the more contact there is, and the greater the transfer of heat. So a smooth tile can draw away more heat than a ruffled carpet can. Also, the transfer of heat will depend on how good the substance is at conducting heat away.<br /><br />Metal is very good, as it has all these free electrons in it, ready to carry currents and heat. Tile is probably reasonable good, while carpet would be quite bad at conducting heat away from you, because of those insulating layers of air.<br /><br />WHAT'S UR OWN VIEW SCIENTISTS.<br />DO SHARE WITH OTHERS.</span></div>

EVER WONDERED WHY WE FEEL COLDER ON THE TILES THAN ON CARPET

The perception of "cold" is due to your nerve cells. If an object is giving heat energy to your skin, you feel warmth. If it is t...

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WHY IS THE SKY BLUE?

<div dir="ltr" style="text-align: left;" trbidi="on"> <div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEip2kC750ykMw-leCL5TbJYQWprKCJxUPXd1ohP5RA3p7OFH-4Shq7WM3uE78hyphenhyphen87YmtxG05pt57xgV8-__0M48O4IvF-FnePkdt6bMxDJ0roS-xJleJjtNDjx8gL36HoaWIGJlbrPYVOo/s1600/tmp_img_8708_blue_sky2-1180264642.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEip2kC750ykMw-leCL5TbJYQWprKCJxUPXd1ohP5RA3p7OFH-4Shq7WM3uE78hyphenhyphen87YmtxG05pt57xgV8-__0M48O4IvF-FnePkdt6bMxDJ0roS-xJleJjtNDjx8gL36HoaWIGJlbrPYVOo/s1600/tmp_img_8708_blue_sky2-1180264642.jpg" /></a></div> After days of rain, a patch of blue sky is a sight for sore eyes. But why is the sky blue?<br /> <br />  Let's start with the Sun. Light from the Sun appears white but it actually consists of many different colours. We can see these different colours of light in a rainbow or when white light passes through prism . As the white light from the Sun travels through the Earth’s atmosphere, it collides with particles of air. The different colours, or wavelengths , of light are scattered by these collisions by different amounts. Blue light (shorter wavelength) is scattered more than red light (longer wavelength). So, when the Sun is high in the sky, blue light is scattered in all directions as sunlight passes through the atmosphere and we see the sky as blue.<br /> <br />  But it’s a different case when the Sun is close to the horizon at sunset or sunrise. Sunlight from the low Sun has to pass through much more atmosphere before it reaches your eyes meaning most of the blue light has already been scattered leaving just the red. The result is the beautiful colours we see at sunset and sunrise and, very occasionally, a flash of greenlight. There you have it!</div>

WHY IS THE SKY BLUE?

After days of rain, a patch of blue sky is a sight for sore eyes. But why is the sky blue?  Let's start with the Sun. Light from th...

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