Today, using mobile phones, you can not only talk and exchange messages, but also shoot video and monitor sleep. Scholars at the University of Glasgow went further: they used part of the mobile phone as a miniature sensor to measure the gravity of the Earth.
The new device is very cheap and can replace the traditional cumbersome gravimeters, which have been used for decades for measuring the gravitational field of the Earth.
In a new instrument called Wee-g, the “duties” of the gravimeter are performed by a telephone accelerometer, for which scientists have given it greater sensitivity.
It is known that the gravitational attraction of the moon influences the ebb and flow. The moon and the sun also act on the earth’s crust, causing its deformation. As a result, there is an insignificant contraction and expansion of the planet within 40 cm. However, even this tiny change in gravity affects the mass of the spring, causing it to move up or down in a range of several tens of nanometers, which is able to fix a new gravimeter.