Why does water always seem shallower than it is?
Water always seems shallower due to refraction of light. The light rays which come from the bottom of the pool travel air. During their travel the ray bent when pass from denser water to rear (air) medium. When the of the coil at a point which above the position. There fore the coil seems to be slightly raised & ultimately pool appears shallower than it really is.
What is the function of making a wire earth?
This is done in order to save our selves from loss in the event of short circuiting. If the electric appliance is properly e earthed, it causes current to pass to the earth easily without any harm to the users. If the appliance is not properly earthed, it will cause a server shock to the user.
How many colors seen in rainbow?
A rainbow is composed of following seven colours.
(1) Violet (5) Indigo
(2) Blue (6) Green
(3) Orange (7) Yellow
(4) Red
Why do we use woolen cloths for protecting over selves from cold?
Basically the wooden clothes are coarse clothes woolen clothes have capacity to retain temperature or heart inside them & do not allow it to escape out. At the same it does not allow to enter the cold inside.
That is why we use woolen clothes for protecting our selves form cold.
Why is rose red and grass green in day light?
This is all due to tendency of rose & grass to absorb constituent of light. Rose appears in the day light because it absorbs all others colours of light except red. In this way, grass absorbs all other constituent of while light except green that is why it appears green.
Ho can bats fly in dark?
How can bats fly in the dark avoiding obstacles?
This is due to the ultrasonic waves produced by bats. The ultrasonic waves produced by them strike the obstacles and returns back to bats. Hence bats are able to find their path without any difficulty.
Why do we bring out hand close to mount while shouting to somebody at a distance?
We always bring out hands close to mount while shouting because by bringing the hands close to the mouth, the sound energy is not allowed to spread in different directions and we make it unidirectional. By doing this we are able to produce loud sound.
Why copper rods and preferred to iron rods making lighting conductors?
Copper rods are preferred to iron rods for making lighting conductors for the following reasons.
