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The irony of this - light can reach us from the sun and the moon and the stars. But it cannot travel through a 1/8 inch dense wall.
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The last sentence confused me.
Think of it like this: if you grab your bedsheets in both hands and whip it up and down, you'll see a wave travel down the length of the sheet. Same thing with a rope, or a rock dropped in water that sends ripples in the form of waves all around its circumference. The wave will move to the end of the sheet and cease to exist because there is nothing more to disrupt. These are disruption waves; meaning the wave itself is not composed of any distinct particle; the wave forms by a disruption at its origin. The force causing the disruption is you holding the sheet/rope or the rock which falls in water. This is how sound works, by disrupting air molecules, and human ears have a mechanism to sense the disruption of sound on a limited scale. Dogs can sense a greater deal of disruptions. Bats and dolphins are extremely proficient in sensing even the slightest disruption.
Light on the hand, which also travels in waves, actually consists of a distinct particle (the photon). It travels in waves innately and not by disruption, meaning it does not need any other particles to propogate on. So, sound originating on the sun will cease to travel further when it's atmosphere is finished, but it's light continues on.
The last sentence was with regards to some experiments they did to find out if sound waves can propogate on a wave of light, i.e. by disrupting the photons. Apparently, it is possible.
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It will go through if the wall is made of glass. Lol.
Thing is, humans can only sense a small segment of light. Microwaves, xrays, infrared waves, UV rays, (and some other rays) are all actually considered as light waves. The difference between them is the difference in wavelength (measured in nanometers). Visible light is of wavelength between 400-700nm or something like that. Anything beyond those numbers cannot be sensed by the human eye. Some animals like most birds can see UV light.
Anyways, afaik, the penetration of a wall by light depends on how tightly the atoms of the wall are packed or held together, i.e. space between atoms may allow a small amplitude/wavelength of light to travel but not larger onea. So, a concrete wall will restrict visible light but will allow other wavelengths like radio waves. A thick glass wall will allow visible light and infrared but not UV. Actually, this all comes under polymer science and that part of physics which I’ve always avoided, because I don’t know understand it fully. 
This graphic provides a glimpse of how little we actually see in the universe with our naked eyes.
http://www.wisconsinacademy.org/sites/default/files/Visible-spectrum.jpg
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Think of it like this: if you grab your bedsheets in both hands and whip it up and down, you'll see a wave travel down the length of the sheet. Same thing with a rope, or a rock dropped in water that sends ripples in the form of waves all around its circumference. The wave will move to the end of the sheet and cease to exist because there is nothing more to disrupt. These are disruption waves; meaning the wave itself is not composed of any distinct particle; the wave forms by a disruption at its origin. The force causing the disruption is you holding the sheet/rope or the rock which falls in water. This is how sound works, by disrupting air molecules, and human ears have a mechanism to sense the disruption of sound on a limited scale. Dogs can sense a greater deal of disruptions. Bats and dolphins are extremely proficient in sensing even the slightest disruption.
Light on the hand, which also travels in waves, actually consists of a distinct particle (the photon). It travels in waves innately and not by disruption, meaning it does not need any other particles to propogate on. So, sound originating on the sun will cease to travel further when it's atmosphere is finished, but it's light continues on.
The last sentence was with regards to some experiments they did to find out if sound waves can propogate on a wave of light, i.e. by disrupting the photons. Apparently, it is possible.
Thank you for taking the time to provide such a nice explanation that even I could understand!
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Thanks again. Interatominc spacing is key I guess for light transport
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Punjab ka hashar ho gaya X-ray samajhtai samajhtai. radio waves are sent in the ground. UV and infrared are opposite in the spectrum. in the visible spectrum you see violet, blue, green, yellow,orange, purple, red. ultraviolet and infrared are outside the spectrum. gamma ray and ultraviolet ray travel large distances. infrared short distance. speed of light is 400m and is of visible light.
whenever you don’t understand which ray travels the most, always say X-ray. 
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to understand wavelength of sound, study tuning fork, book or books, and 2nd tuning fork!
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oh we are talking of food and containers, and lift and drag. even though i have never eaten canned food out in the open, I must say the design of the aerodynamic foil of the lid and container decides when the can bursts open and food in blown out, on a windy day! :)
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Agree with everything except confused by the part which states speed of light 400m
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X-ray, gamma, UV, infrared.. all are light waves and travel the same.
Speed of light is 300,000,000 m/s, and that includes all forms of light such as the visible spectrum, UV, and radio waves. The difference between them is the length of the wavelength - shorter wavelengths (i.e. x-ray, gamma) damage living organism while longer wavelengths (i.e. visible spectrum, radio) are harmless.
http://howtogrowmarijuana.com/wp-content/uploads/2014/02/Visible-spectrum.gif
Radio waves are sent in the ground… does not make any sense.
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Sorry! speed of sound is 400 m, in air I think! Where is audio and voice gallery by the way? :)