Microwave radiation Definition and 23 Threads

For this problem, The solution is, However, when they found the angle, they did not account for the uncertainty. I guess this is allowed still since the sine of the angle will still be greater than 1, correct? Many thanks!

Hi all! I was wondering, Is it possible, given a specific dipolar molecule, to create the perfect oscillating electric field so as to heat it and not, i.e. the water around it? What I'm basically asking is could there exist a specific microwave just for X and not all dipolar molecules without...

Please Notice That the Toroid Coil is Outside the Discharge Tube and yet able to influence electrons moving inside the Tube.

Does anyone know of any studies into exactly how much various metals reflect or absorb microwaves with relationship to the microwaves wavelength and ideally theyt compounds too?

we planning to heat water directly using microwave for industrial purpose. we need only 33deg Celsius for that I need this.

If the cosmic microwave background occurred at the moment that electrons and protons joined together and photons were now free to travel across the universe, then why haven't those photons already passed it. I'm having a hard time understanding why we can see the CMB forever if it was simply a...

Homework Statement Two scientists detected the cosmic microwave background radiation at a frequency of 160 GHz. What is the temperature of the universe? Homework Equations peak wavelength x temperature = 2.898 x 10^-3 c = f x wavelength The Attempt at a Solution I calculated the wavelength of...

< Mentor Note -- Post edited >[/color] 1. Homework Statement So do you know how a microwave has air vents on the side? How much of a distance must be allowed between the vent and the side of refrigerator in order for the Microwave not to overheat? Is 10 cm enough? Would putting an aluminum...

Why do people worry so much about microwave radiation if it has less energy than infrared (heat) radiation? Why do they worry about STANDING near microwaves versus standing near heat sources? Why do they worry about using it to heat up their food if it's lower in energy than infrared?

Is it possible to convert light in the visible spectrum to infrared or microwave light. What processes would be used to do this? Thanks, EJ

hi, 1. radiation travels faster than matter. 2. our Earth was formed much after the big bang. The big bang goes like this. At some point in time and in some point in space (witch we cannot determent so we just leave the location open and say it could have happened anywhere) all the matter...

I have learned that penetration ability increases with frequency. But why can microwave cook faster than infrared wave? Infrared gas a greater frequency so it should penetrate more and thus cook faster. So I'm not so clear about this. Thanks for the help

I am a high school student and i am doing a science fair project about radiation. i have a microwave detector and i would like to know where i can find microwave length radiation so i can test and record results. I have tested microwaves and cell phones but i can't think of anything else. What...

Can Microwave radiation penetrates building materials? I'm living within 120 meters from a mobile phone base station and I'm concerned with possible health effects from it .

I read in a book that: Microwaves are considered lower in energy than infrared waves because they do not affect all molecules, only the polar ones. Polar molecules have slightly different electrical charges at their opposite ends, making them more responsive to microwave radiation than...

Could some of the cosmic background radiation be produced within the fabric of space itself? What if the big bang was not a one of event 15billion years ago but is happening right now today, now, all around us within the quantum world? If indeed the CBr was occurring within the fabric of...

Can anyone explain how the cosmic microwave background radiation (CMBR) "cooled"...I'm supposing that about 300,000 years or so after the bang, when the universe became transparent, things were hotter than 2.7 degrees above absolute zero we observe today... Wikipedia says: So an expanding...

Can standing in front of a microwave actually cause you harm?

I was curious about microwave ovens and how they work and in particular about the microwave radiation they emit and the halflife of this radiation. My layman's understanding is that microwave ovens use a 2.43GHZ emf to heat up water inside food items by attenuating 1 or more? of the few...

Homework Statement A microwave detector is located 0.5m above the surface of a large lake far from the shore. As a star, emitting monochromatic microwave radiation of 21cm wavelength, rises slowly above the horizon, the detector indicates successive maxima and minima in the signal intensity...

Ok, so as I understand it microwave radiation can be detected from 'outer space' but what does that prove? I really don't see why it should be evidence of a big bang, absolutely none whatsoever, infact microwaves would probably one of the last things on my list as evidence. What is the...

I'm not really sure where this question goes. I was wondering why metal behaves so violently when exposed to microwave radiation. For example if you put a metal object into a microwave, it sparks and if there are things attached such as plastic tops will explode off of what ever is in it. What...

Why hasn’t the background microwave radiation from the early universe all burnt out by now? (Penzias, Wilson, Dicke, Peebles, and George Gamow’s discovery of background radiation is what I am referring to.) I’ve heard a couple reasons on what caused the radiation… One about antimatter and...