Perth Amboy evening news., 1922-06-16
Transmitting

How are the dots and dashes. lee
lures and concerts waited through
the air?
We know that most broadcasting
is done on a 360-meter wave length.
We know shops and commercial sta
tons have a normal transmitting
length of 500 meters.
But what is this wave length?
What has it to do with radio?
The flow of electric current in any
circuit is accompanied by the ex-
istence of interlinked magnetic and
static fields which surround the con-
ductors carrying the current and ex-
tend throughout space.
Whenever the direction of current
now in the circuit Is reversed these
fields reverse themselves also.
This reversal does not take place
throughout space instantaneously.
The phenomenon is somewhat SINH
lar to the ripples on the surface of
the water when a pebble is thrown
in.
The disturbance gradually propa-
gates itself at n uniform speed, keen
ing its shape and characteristic unit.
1t dies due to friction losses. This
reversal in the electric field propa-
gates itself in much the same way.
On account of the similarity to
ripples in the water, this phenome-
non Is called an electromagnetic
wave. Such waves, however, travel
outward not only in one plane but
they radiate into space through the
ether.
If a frequently reversed current
Is sent through a circuit, the inter-
lfnLad nnDono%4N A-l -&-ks- a-II--.TI
alternately reverse at the same FREE
quency.
This constitutes a series of waves
progressing from the current-carry-
ing circuit outward into space in all
directions.
The length of these waves radi-
ated Is measured by the distance
between two consecutive points at
which the electric field has the same
amplitude and direction.
The radio transmitting sets emit
these electromagnetic waves into
space.
But tuning our receiving instru-
ments to catch their pitch or wave
length w are able to pull their mes
sages out of the air.
Bambergers tNewark) program to
be broadcasted tomorrow follows:
10:S0-Popular selections.
11:30-Another talk by Captain
William j. Dwyer. head of the hos
pital service of the American Red
Cross at Camp Dix. N. j.. on What
the Red Cross is doing for the ex-
service men,"
12:30-Announcements of the
school activities in the schools Of
Newark and vicinity by Walt X.
Swezey, high school editor Of the
East Orange Times.
1:30-Smiles for the Riddles by
]. e. X. and special records for the
children.
2:30-A piano recital by the Hard
man reproducing player piano.
8:30-Songs by Miss Helen Gail de
Croft, soprano soloist of Vincent
Methodist church of Nutley, N. j..
Program: Might" Rachmannineff;
Alteration" Keats; II Know a
Hill" wheltley; "Ah Love but a
Day" Gilberts; Dance Song"
Handel; Mighty LAX a Rose"
4:30-Peerless trio will sing a
number of popular songs. The
members of this trio are: A. Horice
Owen, piano; Charles w. Murray,
tenor; James Carroll. baritone.
Program: you a have every
light on Broadway" 'Mr. Gallagher
& Mr.. Shear" Granny" WHY
should I cry over you," California
ION the Gin Gin GinnF Shore" THE
little Red School house."
5:30-Dance selections by the
Melody syncopators. the members OF
which are: Angelo de Anglis, Will
liam Rawley, Walter Becker.
Program: Song of India" "Stum-
bling" Tell her at Twilight"