Summertime, Sunny Days, and Sunglasses Day!

27 06 2012

As of last Wednesday, the 20th of June, it is summer!

During summer, the days are longer and hotter because the sun rises earlier and sets later than it does during the other three seasons.  That means we’ll be seeing a lot of the sun for a couple of months!

Did you know that the sun is the Earth’s main source of energy and light?  It’s energy and light both come to the Earth as electromagnetic radiation.  Electromagnetic radiation (or EMR) has many different forms with which you may be familiar.  There are microwaves which are used by the microwave ovens in your kitchens, visible radiation which is the light we can see, and X-rays which hospitals use to see through our bodies.

Sunbeams are visible types of electromagnetic radiation.
Photo by Ronnie, flickr.

There’s another type of radiation that the sun sends that is harmful to humans.  This type is called ultraviolet radiation (UV radiation).  This radiation is very strong and can cause damage to the cells of our bodies.  Luckily, the Earth’s atmosphere absorbs the most-damaging of the ultraviolet rays.  But the atmosphere can’t absorb all of the UV rays which come to Earth, so we have sunscreen and sunglasses to help protect our skin and eyes from harmful rays.

Sunglasses work by reflecting or filtering the light travelling into our eyes and only allowing visible light (which does not cause harm) to enter our eyes.  They use different tints and films on the lenses to filter different types of light.  With the various tints, frames, and colors, sunglasses can also be pretty cool-looking!

Photo by EndOrfinaS~, flickr.

Sunglasses are a great invention because they keep our eyes safe and healthy when the sun is the brightest.  Remember, even when you are wearing sunglasses, it’s not safe to look directly into the sun. So celebrate Sunglasses Day, but also celebrate sunglasses on all of these bright summer days and look great while being safe!

About these ads

Actions

Information

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s




Follow

Get every new post delivered to your Inbox.

Join 41 other followers

%d bloggers like this: