Prime Minister  Narendra Modi has been known to prefer giving public
address in Hindi, but nowadays he is speaking equally well in English.

The technology that has helped him is a teleprompter which is also
frequently used by US President Barack Obama even for short speeches.

Here's how it works:

A teleprompter usually consists of two mirrors that are semi-transparent,
each mounted on a small, thin stand, with each mirror set at a 45 degree
angle. The text from the monitor is visible on the mirror for the speaker
to read.

At the base of the mirror is a flat LCD monitor, pointed at the ceiling. It
displays the words of speech in a large, typically 56 pt to 72 pt, font.
Usually an operator controls the speed the speech, who listens to the
speaker and follows along. The operator waits, if the speaker pauses,
before moving on.

Though the speaker can easily read from the mirror, from the audience side
it looks like a clear piece of glass because of the anti-reflective coating
that is on it. During his speech, the speaker simply looks from one
teleprompter to the other. This gives an impression that he is looking at
the audience while giving his speeches



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With best wishes

S Chander

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