Becoming an ultrasound technician usually requires a two year certification program. There is a dearth of technical schools that offer these programs across the world.
X Rays and Untra sound
I created a untra sophisticated armor which allows me to survive a bomb explosion
Different telescopes utilize different parts of the electromagnetic spectrum. Two types of optical telescope are refracting and reflecting. There are also different kinds of radio telescope investigating different bandwidths from the infra red to the untra violet
yes beause without it we woukd be dead because of the suns harmfull untra villit rays adn before teh ozon layer was created all animal had to live under water becaus ethat was the only place they could live with out dying of the rays
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -UNTRA-. That is, seven letter words with 2nd letter U and 3rd letter N and 4th letter T and 5th letter R and 6th letter A. In alphabetical order, they are: suntrap
It is a diode with differently doped payers. An electron can only exist at certain discrete energy levels, so when it is forced to move from one type of dope to another, it must acquire or dump energy. In a LED, it dumps energy as a photon of a certain color. The available energy levels only allow red, green, or untra-violet photons, so nowadays all (or most) LEDs are untraviolet LEDs with a speck of a phosphor which converts ultra-violet into visible light.