Moon Measuring

The video explains how mirrors left on the moon by Apollo astronauts are used to measure the moon's distance from Earth. Scientists fire lasers at these mirrors, and when photons hit them, the reflected light is measured to calculate the distance. This process has been ongoing for decades, providing precise data on the moon's orbit and its gradual movement away from Earth.

What was the primary purpose of placing mirrors on the moon?

• To communicate with lunar missions

• To reflect sunlight back to Earth

• To measure the moon's distance from Earth

• To capture images of the moon's surface

How do scientists measure the distance between the Earth and the moon?

• By firing lasers at mirrors on the moon

• By measuring the moon's gravitational pull

• By using radio waves

• By observing the moon's shadow

What happens when a photon successfully hits a mirror on the moon?

• It splits into multiple photons

• It gets absorbed by the moon

• It reflects back to Earth

• It changes color

How accurate is the measurement of the moon's distance from Earth?

• To the nearest centimeter

• To the nearest meter

• To the nearest millimeter

• To the nearest kilometer

At what rate is the moon moving away from Earth?

• 1 centimeter per year

• 50 centimeters per year

• 3.8 centimeters per year

• 10 centimeters per year