Yes he did. He invented the fountain pen.
is a pen a insulator of conductor
He did NOT invent the fountain pen he patented it. The first fountain pen was invented by a french-man named M.Bion. Lewis Waterman just improved it.
the boy was clicking his pen the clicking noise was bothersome i was clicking a pen
The plastic coating of the pen is a solid, the INK inside, that shows what you wrote is a liquid, and there is no gas what-so-ever.
The points of measurement for a lateral skull radiograph is the high point of the zygomatic arch.
A radiograph is an image produced using radiography, such as an x ray. An example of this term in a sentence would be, "The doctor carefully examined the radiograph of the patient's shattered knee before suggesting a course of treatment."
X-ray image.
Overlapping of teeth in a radiograph, assuming no unusual malocclusion, is caused by improper horizontal angulation of the x-ray beam.
On an extraoral radiograph, the entire jaw and skull are seen. This type of radiograph is helpful in assessing overall bone structure, joint alignment, and general dental health. It can also be used to identify impacted teeth and potential bone abnormalities.
The contrast
A periapical radiograph is used to visualize the entire tooth and surrounding bone for diagnosing conditions like tooth decay, infections, and bone loss around the tooth. On the other hand, a cephalometric radiograph is used to assess the skull structure, teeth alignment, facial proportions, and growth patterns, making it useful in orthodontic treatment planning.
Air in sinuses will show up on a radiograph as black, but fluid will be cloudy or white (opaque). This helps the radiologist to identify fluid in the sinuses.
as the buccal cusp has lesser magnification cast on radiograph as compared to the lingual cusp
Refilling them with ink is very simple. Cleaning them however is tricky. Radiograph pens come with a tool used for unscrewing the intricate tips so that you can take the entire pen apart and clean them when they get dried out and jammed. If you want to refill the pen just unscrew the bottom as well as the colored piece and you'll have access to the ink cartridge. If you want to clean them you must be very careful when taking the tip apart and holding on to the pieces. Inside the very tip there is a hair-thin piece that you DO NOT want to loose or bend. It is very fragile and the finer the tip size the thinner it will be almost exactly the width of a strand of hair. Take note as you take the pen apart so you'll remember how it goes back together. Also I've heard that if you keep your pens in the refidgerater then they wont dry out. Hope this helps
It is Radiograph and it is used by a Radiologist.
A radiographic image of the Aorta is called an aortogram.