How long does it take for a pulse of laser light to reach the moon&bounce back to earth?

Answer The speed of light is 186,000 miles per second. The average distance between Earth and the moon is 238,857 miles. With these numbers, we can calculate that it takes light 2.568 seconds to go to the... Read More »

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Why can you see the moon when it is still light outside?

The moon is above the horizon and potentially visible to you, anywhere on planet Earth, some 12 hours out of every 24 hours. While it is easiest to see the moon at night, the moon can also be seen ... Read More »

Can solar panels collect light from the moon at night?

Solar panels cannot collect light from the moon because the moon does not create its own light. The moon acts as a mirror, reflecting light from the sun back to earth. These reflected sun rays are ... Read More »

The National Aeronautics and Space Administration NASA says that there is ice on some parts of the moon. What does this tell you about temperatures on these parts of the moon?

The message is that it's really cold there. As the moon has no atmosphere, there is no atmospheric pressure. Atmospheric pressure has a pronounced effect on the boiling point of water. If the water... Read More »

Why Does Ultraviolet Light Cause Chemical Damage to Your Skin While Infrared Light Does Not?

Energy travels through space in the form of waves called electromagnetic radiation. Types of electromagnetic radiation include gamma rays, X-rays, ultraviolet rays, visible light, infrared rays, mi... Read More »