The Radio and Television

Italian ____________________ gets credit for building the first radio

• Alexander Graham Bell

• Guglielmo Marconi

• Karl Benz

Marconi wanted to send signals without wires. His work led to the invention of __________________________

• the steam engine

• the light bulb

• the wireless telegraph or the Raido

First Marconi used electrical signals to ring a bell ______________________________

• on the roof

• on the other side of a room.

• in the basement

Then he sent electrical signals from ____________________________

• one house to another

• one floor of his house to another

• one street to another

His radio messages were soon traveling across the __________________________

• river

• street

• Atlantic Ocean

___________________________________ invented a TV system based on a camera tube.

• Thomas Edison

• Vladimir Zworykin

• Alexander Graham Bell

Early TV sets had small screens and so many other parts, they needed big boxes to hold them.

• true

• false

Images on early TVs didn't use to be in black and white.

• true

• false

TVs haven't changed a lot since the first models!

• true

• false

LCD and LED technology make today’s TVs sleek and thin.

• true

• false