How to understand if the ultraviolet light passes through when choosing sunglasses?

How to understand if the ultraviolet light passes through when choosing sunglasses?

How to see invisible UV Light - Easy At-Home Science

Previous questionHow to grow a beard if you are 20 and your face only grows “not a mustache, but a pass in panties”? What "ointments" for beard growth can you recommend?
Next questionWhat happens if you pee on a bare wire?

answers (3)

Answer 1
August, 2021

If for driving a car it is better to take glasses with polarization, and filters with the highest protection are marked with DIN EN ISO 12312-1, but this is now a rarity and they can only be found in professional glasses for sports and driving.

Answer 2
August, 2021

Better be puzzled by the question of what the lenses are made of, and filters and their presence is a self-evident fact, as a rule, this is a mandatory UV 400 mark, if this is not there, then glasses are completely free and you should not take them.

Answer 3
August, 2021

First, we need to clarify what kind of ultraviolet we are talking about and what percentage of its glass should stop in order to say "does not transmit".

Visible light occupies the wavelength range from 380 to 780 nanometers. Next comes ultraviolet.

The biological effects of ultraviolet radiation in the three spectral regions are significantly different, therefore biologists sometimes identify the following ranges as the most important in their work:

Near ultraviolet, UV-A rays (UVA, 315-400 nm)

UV-B rays (UVB, 280-315 nm)

Far ultraviolet, UV-C rays (UVC, 100-280 nm)

UV transmittance:

Quartz glass - Very good

96% Si-O2 glass - Good

Borosilicate - Medium

Lead - Poor

Sodium-lime - Poor

In any case, you will not face an excess of ultraviolet radiation and damage to the cornea by UV rays. But this does not mean that you can look at the sun, since in addition to UV rays, there is also an infrared and visible range with rays of different stripes and colors.

Related question

How long does it take for food to pass through the digestive tract before defecation?

Read more

Everyone knows that if you direct a beam of light onto paper through a lens, it will light up. Why doesn't this happen with the retina? After all, the eye is a lens system 🌝

Read more

Why, if the water is not swallowed when you drink, then it does not pass into the stomach?

Read more

Testing UV Protection Of Sunglasses And Regular Glasses

When will the fashion for big lips / chest / butt pass?

Read more

Do I need to wear sunglasses on sunny days in winter? If so, why?

Read more

What to look for when choosing a fitness trainer?

Read more

If you could only choose one of the two, which would you choose: to sing divinely or to dance amazingly?

Read more

Explain scientifically: what happens when we listen to our heart or mind when choosing something?

Read more

How can I tell if my sunglasses are UV protected? | SmartBuyGlasses

How would the life of one individual person pass, in your imagination, if he was immortal?

Read more

How to understand the subconscious?

Read more

How to lead a guy to have sex outside the home bed? Even if he reacts harshly to light harassment in an empty cinema hall

Read more

How to choose the right boxing gloves for your child?

Read more

How to choose football boots?

Read more

Test your sunglasses for ☀ UV protection ☀ The Truth, using a blacklight to check if UVA rays

Where to start in order to pass the TRP norms, if there is complete zero in sports?

Read more

How to choose contact lenses for the first time?

Read more

How to choose a mouthguard?

Read more

How to understand if a person is crying sincerely or not?

Read more

What to do if absolutely all school subjects are given, but it is impossible to pass the physical education standard?

Read more

Selecting Sunglasses for Eye Health

How long after the first sex is the next penetration possible? Or is it possible not to wait at all when time passes? They say you have to wait for it to heal

Read more

What is the most important thing for you when choosing clothes: brand, comfort, etc.?

Read more