Book 13, Question 129 · Video
Why Does a Flashlight Look Weaker in Fog or Rain?
A flashlight looks weaker in fog or rain because tiny water drops scatter the light! Each drop bounces some light in every direction. Less light gets through to faraway things.
Read the full answer →Watch on YouTubeSee the series on Amazon
What Crafty Clover says in this video
Intro
Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why does a flashlight look weaker in fog or rain?
The Big Idea
A flashlight looks weaker in fog or rain because tiny water drops scatter the light! Each drop bounces some light in every direction. Less light gets through to faraway things.
Tiny Drops
Step one: tiny drops. Fog is made of millions of tiny water drops hanging in the air. Rain has bigger drops that fall, and they scatter light too.
Light Bounces
Step two: scattering. Each drop bounces some of your flashlight's light in every direction. Some of it even bounces back toward your own eyes.
Weaker Beam
Step three: a weaker beam. The drops light up right in front of you like a glowing wall. Less light reaches faraway things, so the beam seems weaker.
A Closer Look
Let's take a closer look! Your flashlight sends out a beam. It meets millions of water drops. The drops scatter the light every which way. And the beam seems weak.
Quick Facts
Quick facts! Drivers use low beams in fog because high beams make the glow brighter. Low beams aim lower, so less light bounces back at the driver. Fog is basically a cloud near the ground. Slow down and stay extra careful when it is foggy or rainy.
Think Like a Scientist
Now, think like a scientist! In a dim room, spray a fine mist from a spray bottle into the air. Shine a flashlight through the mist and watch the beam light up. Compare it with the beam in clear air. Never shine the flashlight at anyone's eyes.
Outro
Fog scatters flashlight beams, so they seem weaker. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!