Heliograph

Draw a picture with the rays of the sun

The ears work in a similar way to antennae, receiving sound from the outside. Enlarging the surface area of these living antennae results in increasing the intensity and changing the frequency spectrum captured and directed to the auditory canal. The larger the receiving area, the better we hear distant sounds. Check this phenomenon with your own ears in the open-air section of the exhibition. The same method was used by troops in anti-aircraft defence in WWI and partly in WWII to monitor enemy aircraft.

Sdílejte!

Heliograf

VIDA! Program

2930311234
567891011
12131415161718
19202122232425
26272829123
26272829123
45678910
11121314151617
18192021222324
25262728293031

Vyhledávání

Zadejte hledný výraz a potvrďte

Možná hledáte