What is Kinescope?
A kinescope is a form of cathode ray television reproducing
apparatus in which the amplified received signal impulses vary the strength of
an electrostatically focused electron beam which is caused by suitable
deflecting coils to scan a fluorescent screen in synchronism with the scanning
beam in the transmitter, rendering it luminous in proportion to the light
falling on to the transmitting screen.
What is MALTER EFFECT?
An effect is observed when a semiconductor of a high
secondary-emission ratio, such as caesium oxide, is subjected to electron
bombardment. The semiconductor can become strongly positively charged and if a
layer of such a material is separated by a thin MALTER EFFECT insulating layer
from a metal plate it can be used to develop a potential difference. With an
insulating layer of about 0.1-micrometer thickness, a potential of up to 100
volts can be produced.
What is Photo Scope?
An instrument
for recording waveforms of audio frequency. It is claimed that deaf persons
can be trained to interpret such records of speech and music.
What is a Selenium cell?
A small block or cell containing a substance the resistance
of which becomes less when light falls upon it. Used, on account of this
property, for various purposes but superseded to a considerable extent by other
forms of light-sensitive cells.
What is Isochronisms?
The running, exactly in step at equal speed, of two shafts,
etc., such as those of the selecting devices in some forms of the printing
telegraph system, where the sending and receiving apparatus is kept in step by
periodical correcting current impulses, or in general the performance of
related functions at the same speed.
What is the Gyromagnetic effect?
The phenomenon by which the magnetization of material medium
subjected to a magnetostatic field upon disturbance relaxes back to
equilibrium by damped processional motion about the direction of that field,
and by which this processional motion can be maintained by an alternating
component added to the magnetostatic field.
What is the Hall Effect?
When a conductor carrying current is placed in a magnetic
field that is at right angles to the direction of the current, an electromotive
force is produced in the direction that is perpendicular to both the current and
the magnetic field.
What is Parylene?
Parylene is a crystalline material, which has excellent
dielectric properties that can be vapour deposited on almost any substrate to
form extremely thin insulating films. The complete name is diparaxylylene.
What is Photo Resist?
A chemical used in photolithography for producing an image of a mask. A negative photo resists forms polymers on exposure to radiation while a positive
photoresist uses polymers that de-polymerize by the action of light. Positive
resistance produces a positive image of the mask.
What is Spectrum Analyzer?
A test instrument using a cathode ray tube that measures and
displays the intensities of the frequency components of a complex waveform throughout
the frequency range of the waveform.
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science