The Reason Why Objects in a Car’s Side-View Mirror Are Closer Than They Appear

aydinozcanbaz/iStock via Getty Images
aydinozcanbaz/iStock via Getty Images

“Objects in mirror are closer than they appear.” It's a warning you see in basically every car, but why can't passenger-side mirrors display objects accurately? Well, it's actually a careful design choice made with safety in mind.

The way we see things is dependent on how light reflects off objects around us. An object's color, texture, shape, and other characteristics influence the direction and intensity of light that bounces off them. If the objects are reflected off an intermediate object, like a mirror, our perception of the original object may be distorted.

The shape of the mirror also makes a difference in our perception. In the U.S., passenger-side mirrors are convex (curved slightly outward), whereas driver-side mirrors are flat. A convex mirror placed on the passenger side reduces the driver's blind spots on that side of the vehicle by presenting a wider field of view, but it also makes other cars appear farther away due to a slight distortion caused by the shape. The flatter mirror on the driver’s side produces a more accurate depiction of what’s behind the car with a more narrow field of view, since light bounces off in the same direction that it hits the mirror and doesn't distort the reflection of the object.

When the two mirrors' reflections are combined in the driver's point of view, drivers have the ability to both see wider areas on the passenger side while keeping their eyes (mainly) on the road. The flat-convex combo has been the U.S. standard for years, though the U.S. Department of Transportation is looking into the safety benefits of two convex mirrors, which European cars usually sport.

For now, always remember to check your mirrors frequently, and look over your shoulder before you change lanes. (Don't forget your turn signal!)

The Reason White Castle Slider Burgers Have Five Holes

White Castle
White Castle

While it’s not often mentioned in conversations about the best fast food burger on the menu alongside staples like Shake Shack or In-N-Out, the White Castle slider burger still holds a special place in the stomachs of those who enjoy their bite-sized convenience. In 2014, TIME even named the slider the most influential burger of all time, with its debut in 1921 helping begin our nation’s obsession with fast-service burgers.

Peel the bun off a White Castle burger and you’ll find the square meat patty has exactly five holes. Why? Thrillist writer Wil Fulton went looking for an answer to this gastronomic mystery. It turns out that the holes serve a very functional purpose.

In 1954, a Cincinnati-based White Castle employee named Earl Howell stuffed his location’s suggestion box with a note that said the patties might cook more quickly if they were pierced. The reason? The franchise steams its burgers on the grill, and the holes allow the steam to better penetrate the stacks of patties (usually 30 burgers tall) that are piled on the grill at one time. No one has to flip the burgers, and they wind up coming out of the kitchen faster. The steam also picks up the flavor of the onion acting as a bottom layer, allowing it to spread through the stack.

Howell’s idea soon spread from Ohio to White Castle restaurants nationwide. The company facilitates the creation of the holes by puncturing a “meat log” and then slicing it and sending the patties to locations.

If you enjoy their distinctive flavor, the holes have a lot to do with it. Enjoy.

[h/t Thrillist]

We've All Been Riding Escalators Wrong, According to the Manufacturers

Rattankun Thongbun/iStock via Getty Images
Rattankun Thongbun/iStock via Getty Images

If you live in a city, you probably know that the "rules of the road" when it comes to riding escalators are similar to those on an actual road—and should be taken just as seriously. Stand in the right lane, walk in the left lane, and never, ever block traffic by stationing yourself between the two.

But what if we told you that the one clueless tourist with a hand on each rail and a foot in each lane was actually riding the escalator correctly? According to the CBC, escalator manufacturer Otis Elevator Company recommends that “users stand in the middle of the escalator with hands on both railings for maximum safety.”

Lifehacker pointed out that Otis’s official list [PDF] of safety advice online doesn’t expressly mention using both handrails, but does encourage people to “keep a steady grip on the handrail” and “stand in the center of the step and face forward.” However, even if the passenger in front of you is standing in the middle with just one hand on a rail, you still wouldn’t have an easy time continuing your uphill climb without asking them to move.

Speaking of your uphill climb (or downhill march), it’s less efficient than you think it is. While choosing to walk might shave a few seconds off your personal commute, studies have shown that if all people stood, using both escalator lanes instead of leaving one for walking, the machine could ferry about 31 extra passengers per minute.

It’s not the only argument against walking on escalators. The CBC cites studies in Japan and China that suggest walkers not only increase the likelihood of escalator accidents, but they also contribute to the degeneration of the machines themselves.

While speed-walking city slickers might balk at the idea of standing still, hopefully this information will at least help them view stationary rail-huggers as safety-conscious citizens rather than oblivious nuisances.

[h/t Lifehacker]

SECTIONS

arrow
LIVE SMARTER