How long would it take a laser beam to reach the moon?

about 2.5 seconds
By measuring the time it took for the beam to return—about 2.5 seconds—scientists could use a simple formula [distance = (speed of light multiplied by the time taken for the light to reflect)/2] to define the distance between the Earth and the moon with a remarkable precision of plus or minus 25 centimeters (10 inches) …

Can a laser light reach the moon?

The typical red laser pointer is about 5 milliwatts, and a good one has a tight enough beam to actually hit the Moon—though it’d be spread out over a large fraction of the surface when it got there. The atmosphere would distort the beam a bit, and absorb some of it, but most of the light would make it.

How far can a laser light travel?

Around 100 meters away from a red laser pointer, its beam is about 100 times wider and looks as bright as a 100-watt light bulb from 3 feet away. Viewed from an airplane 40,000 feet in the air — assuming there’s no clouds or smog — the pointer would be as bright as a quarter moon.

Is it illegal to point laser in the sky?

You may be arrested — or worse In the United States, there is a federal law that makes it illegal to aim a laser pointer at an aircraft, or the flight path of an aircraft. Outside the U.S., there are also other countries with laws against laser pointers.

Will the moon drifted away from the Earth?

Question(s): The Earth’s moon is moving away from Earth by a few centimeters a year. Calculations of the evolution of the Earth/Moon system tell us that with this rate of separation that in about 15 billion years the Moon will stop moving away from the Earth.

Is it possible to put a geostationary satellite over the North Pole?

As the north pole is away from the equatorial plane. it will not be possible to put a geostationary satellite over the north pole. In one hand you hold a 0.11-kg apple, in the other hand a 0.24-kg orange. The apple and orange are separated by 0.85 m.

How long does it take an alpha particle to travel around a field?

Therefore, since the alpha-particles are positively charged, the magnetic field must point down. Because the particle is only going around a quarter of a circle, we can take 0.25 times the period to find the time it takes to go around this path. Let’s start by focusing on the alpha-particle entering the field near the bottom of the picture.

How do you calculate light travel time from diameter and angle?

The light-travel time is the distance, 1 AU, divided by the speed of light, i.e., time = distance/speed = (1.496 × 1011m) / (3.00 × 108m/s) = 0.499 × 103s = 499 s = 8.3 minutes. 34. Since you are given diameter (D = 2.6 cm) and angle, and asked to find distance, you need to rewrite the small-angle formula as d = (206,265)(D) / (α).