| Show AINT NATURE JUST GRAND Why the Sky Is Blue and Fish Make Mako No Nol Noise Going Through I Water Why is ha the sky blue Not one verson per ver- son In a R hundred could give ghe a satisfactory satisfactory satis saUs- factory factor answer to the question And Antl J yet the explanation as given by Pro Prof W. W H. H Bragg at the Royal Institution Is quite simple The blue sky he ho explained is due to the Interception by particles In the atmosphere of the blue rays which form torm a part of ot the white light of the sun The parts of ot white light ht conveyed conveyEd con con- conveyed by longer red and yellow ellow light waves mana manage e to jump the man many substances substances sub- sub stances In the atmosphere and are mo fE seen n only at nt sunrise and sunset The professor Illustrated his meanIng meanIng meaning mean- mean Ing b by showing a dl disk k of ot light on the screen which passing through a bowl of water became gradually redder as the water got till at last laRt after an Imitation of f the sun In a R November No No- vember to fog It faded away Professor Bragg has also revealed some Rome of the mysteries of ot sound If U you put a stick i IB III a revolving bowl of ot water It sets up UI little whirlpools behind It In Tn the same way the wind rushing past trees forms whirlwinds on a small sinai scale and these cause th those e sounds so 80 admirably described by the Imitative word sou soughing Similar sounds are are set et up tip by telegraph wires Why Wh WhIs Is It that fishes make no die dis when when swimming through the water althou although h there Is a rushing noise when a stone Is flun flung in This Is explained by the fact tact that In the latter case It Is the filling of ot the cavity that Is made rather than the mere Impact which causes the noise whereas the body of ot the fish fifth h F IB is isso HO so shaped that when It moves mores through the water It leaves no such cavity behind be b hind It and therefore there Is no die dis |
