Frequency

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How do Animals Communicate?

How do Animals Communicate?

Humans have invented new and advanced ways of communicating with each other. Television, radio, telephones and of course email. You will be surprised to know that animals who seem to have very simple methods of communication – using their bodies and voices – are also capable of long distance communication. How do Animals Communicate? [Illustration by Shinod AP] Foot stomping and low frequency rumbling created by elephants can travel upto 20 miles and is used by elephants to signal other herds or members, says an article in the Hindu newspaper....

The Colours of Light

The Colours of Light

A beam of light seems to have no colour. Actually, it is made up of coloured rays. Usually, these coloured rays combine to form the white light. But it is possible to see the different colours at certain times. For instance, when it rains and the sun’s rays pass through raindrops. Since the raindrop has many sides or surfaces, the rays split up into a fanshape of different colours. And we see the rainbow. Violet, indigo, blue, green, yellow, orange and red....

Which Film Stars were Inventors Too?

Which Film Stars were Inventors Too?

Most movie fans have seen or at least heard of Hollywood legends Hedy Lamarr and Steve McQueen. But how many know that these two were inventors who have significantly changed our lives. Nobody? Not surprising. But it’s true. Hedy Lamarr and Steve McQueen were both Hollywood stars and inventors. Hedy Lamarr thought of torpedoes guided by radio signals and Steve McQueen invented the bucket seat that has revolutionised the automobile industry. However, Hedy’s invention was never used for the purpose invented....

What does a Train Whistle tell us about the Universe?

What does a Train Whistle tell us about the Universe?

I remember my first visit to the railway station as a child of five. The excitement of the approaching train was an experience I have never quite forgotten. At first I heard a train whistle far away, low and distant. As the train got closer, the sound of the whistle not only increased, it became shriller, and difficult to bear. So much so that I covered my ears in alarm! Once the excitement had passed, I discovered a secret – even with my eyes closed and by just hearing the whistle, I could tell whether a train was approaching or moving away....

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