How is the Distance Between the Earth and Moon Measured?

-
The distance between the Earth and the moon can be measured accurately by timing how long it takes a laser beam to reach the moon and be reflected back again. A large mirror has been placed on the moon. The speed of light is known, time is measured by this method and distance is calculated by the formula : Speed = Distance/time

Comments

Post a Comment

Popular Posts

How does a Mirror Work?

-
Image
A mirror is a glass with a coating at its back. When we look into a mirror, light rays from us go and strike it. The rays pass through the glass and are reflected from the coating. The light is reflected back by a flat mirror at the same angle as it strikes the mirror. This makes an image seen in a flat mirror appear to be the same size and shape as the object. But a mirror image is always reversed.
Read more

Optimizing Data with Content-Encoding

-
Image
  🌟 Dive into the world of Content Encoding! 🚀 Ever wondered how those large files magically shrink in size before reaching your device? It's all thanks to Content-Encoding! 🎉 Check out the full article here:  Optimizing Data with Content-Encoding
Read more

What is a Neutron Star?

-
Image
A neutron star is the smallest and densest kind of star . It is about 20 km in diameter and have more than 1.4 times the mass of our Sun. This means that a teaspoonful would weigh a billion tons! As long as a star shines, the power of its radiation holds all the parts of atoms apart. But when the star begins to die, the gravity in the star makes the outer layer collapse inwards with such force that the centre is crushed to solid neutrons because the electrons and protons are forced together to make neutrons. A neutron star is one of the strangest objects in the universe. It becomes a million times heavier than lead. A pinhead size piece of a neutron star would weigh as much as a huge multi-storeyed building .
Read more

What is Gymnastics?

-
Image
G ymnastics consists of a series of various physical exercises that are performed on equipment, such as horizontal bar, parallel bars, rings, balance beam , pommel horse and vault horse. It was very popular in ancient Greece and was included in the first Olympics in 1896. There are separate exercises for men an Women perform graceful steps, runs , jumps, turns and somersaults on a narrow wooden beam. They also hang from high bars and leap over a vaulting horse. They also perform floor exercises to music which resembles a dancers‘ movement in graceful style. Men hang from a high bar, rings, swing on parallel bars, vault and do handstands . They swing their legs and body on pommel horse and leap over a vaulting horse. Olga Korbut of Soviet Union performed very brilliantly in 1972 Olympics and the widespread television coverage of her performance made Gymnastics a very popular sport.
Read more

What is a Komodo Dragon?

-
Image
T he Komodo dragon is the largest lizard in the world and belongs to the family of monitor lizards. Komodo is, in fact, the largest land lizard to have ever existed on the earth and can measure up to three metres long. They inhabit only the island of Komodo and the neighbouring Indonesian islands. The dragon hunts wild pigs, deer and monkeys and also scavenges on carrion. Young Komodo dragons catch insects and small mammals. Which Birds are the Fastest Fliers? Swifts are among the fastest flying birds. The spine tailed swifts of eastern Asia are the fastest known birds
Read more