when a sample is placed in the focus of the convex lens of a microscope, a virtual, erect, and magnified image is formed at the least distance of the distinct vision. Parts of a simple microscope; mirror as illuminator, convex lens for magnification, stage and metallic stand with base. Us...
An endoscope can be fitted with surgical instruments; it can send pulses or heat and electricity and destroy small tumors or gallstones. Specialized endoscopes have their own names, such as: Bronchoscopes - they examine ...
Functional Electrical Stimulation.Devices that deliver small electrical pulses to paralyzed muscles can be used to restore some limited functioning. For example, someone who otherwise has no use of their legs might be able to ride an exercise bike. The devices have also been used to improve bladde...
A water flosser, a hand-operated gadget that is used to spray steady streams of water in pulses. Its primary function is to remove food that is stuck in between the teeth. However, the device can also be used to remove dirt and dust in other items. It is suitable for people who have...
which eventually fades. Potential side effects include minor redness or swelling around the treated area, skin discoloration, blisters, and rarely scarring. Intense Pulsed Light (IPL) therapy is a more recently developed treatment for spider veins. IPL delivers pulses of different bands of light to...
Types of Stepper Motor A stepper motor is an electromechanical device which converts electrical pulses into discrete mechanical movements. … 4 Major Types of Electrical Substations The assembly of the apparatus used to change some characteristic (e.g. voltage, a.c. to… Types of Power Plants Wh...
atherosclerosisor narrowing of the arteries. This might include listening to the heart and palpating or feeling pulses in the neck, arms, and legs and listening with a stethoscope to the large blood vessels in the body including the carotid and femoral arteries and the aorta. ...
Modulation, in electronics, technique for impressing information (voice, music, pictures, or data) on a radio-frequency carrier wave by varying one or more characteristics of the wave in accordance with the information signal. There are various forms of
In pulse modulation, a series of on-off pulses serve as the carrier wave that is subsequently modulated. In pulse-coded modulation (PCM), the information signal converts the carrier into a series of constant-amplitude pulses spaced in such a manner that the desired intelligence is contained in...
5:Sensors gather light pulses to convert to X and Y velocities. Amouseis a handheldpointing deviceforcomputers, involving a small object fitted with one or more buttons and shaped to sit naturally under the hand. The underside of the mouse houses a device that detects the mouse's motion rel...