0
SPF 50 stands for Sun Protection Factor 50, so if the normal time to get burnt is 20 minutes you will be safe for 50 times that.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Which component of the SPF algorithm is inversely proportional to bandwith?
link cost
How do they measure a 50 caliber bullet?
It depends on what you mean by measure, but if you mean in regard to the "50 caliber" part, caliber is the diameter of the piece of lead.
How much energy do you end up with if there is fifty joules of potential energy?
Not sure what you mean. 50 J = 50 J.
How do you protect skin form ultraviolet?
You can put sun screen on and the SPF has to be 15 or more... You can put on sun glasses Find shelter to sit under Wear A hat with a brim on it
What does the term decibel mean?
Decibel is a measure of sound and is logarithmic, meaning 50 decibels is twice as loud as 40 decibels.
Would adding spf 30 sunscreen to spf 50 sunscreen make it spf 80 sunscreen?
No. SPF 30 lets in 1/30 of burning UV rays, while SPF 50 lets in 1/50. Adding the two together is pointless and would not result in high levels of skin protection.
What is the highest SPF facial sunblock can be purchased in?
It was probably SPF 30 because that blocks 96.7% of UVB rays. SPF 50 blocks 98% so you aren't really getting that much more protection than the SPF 30. Neutrogena has a SPF 100 but it really isn't necessary because as I said, SPF 30 is already blocking a significant amount, and SPF 50 doesn't even make that much more of a difference. Just for your information, SPF 100 blocks 99% of UVB rays so it REALLY doesn't do much more than SPF 50.
Is SPF 50 good for skin?
Yes, it is fine. If you have fair skin you can wear an even stronger SPF.
What are the SPF levels of lotion for Coppertone?
Probably 5, 10, 15, 20, 25, 30, 35, 40, 25, and 50. Why do they would make lotion like SPF 5 and 10 while they already have SPF 50?
Does the SPF count?
"The Sun Protection Factor (SPF) displayed on the sunscreen label ranges from 2 to as high as 50 and refers to the product's ability to screen or block out the sun's harmful rays. For example, if you use a sunscreen with an SPF 15, you can be in the sun 15 times longer that you can without sunscreen before burning. Consumers need to be aware that SPF protection does not increase proportionally with an increased SPF number. While an SPF of 2 will absorb 50% of ultraviolet radiation, an SPF of 15 absorbs 93% and an SPF of 34 absorbs 97%." from http://www.melanomafoundation.org/prevention/facts.htm
Does a higher spf number mean more protection?
Yes, the higher the SPF, the more sun protection you will get.
Does spf 50 has the same coverage as spf 25?
As scientists uncover more information about exposure to the sun and the potential damage it can cause it is important to understand the level of SPF in products. 50 is a higher number and can provide more coverage then an SPF of 25 if applied in regular intervals especially if the person is going to be outdoors for an extended period of time during the heat of the day.
Is SPF 50 better then SPF 30?
From the Journal of The National Cancer Institute: According to Weinstock, the cap on SPF labeling is not a major issue for the public as a whole. "I think that if the general public uses SPF 30 or greater, that's sufficient." As Weinstock explained, SPF is a reciprocal function: SPF 15 lets in 1/15 of the burning rays; SPF 30 lets in 1/30; and SPF 50 lets in 1/50. Therefore, the difference between SPF 30 and SPF 50 is only a difference of 97% effectiveness versus 98% effectiveness. "That little bit may be important to some people who have particular sensitivity," said Weinstock. "But, to the general public, it really is not that critical." Remember that SPF30+ sun cream will block out 97% of the sun's rays. SPF50+ will block out 98%. There is NO bearing on the DURATION you can put the sun screen on and expect protection. The issue is that people generally don't put on enough, so they're only getting around 50% protection because of their own vanity. The more you put on, the closer you get to the full coverage offered by the cream. If you use an SPF30+ cream you'll only get a little less protection than the 50, but you need to use enough. The SPF isn't the issue, it's the usage.
What SPF number that wont get you tan?
Factor 50 total sun block for children.
What percent of the suns ultra violet rays are blocked with spf 25 sunscreen?
50%
What SPF sunscreen should one with light skin use?
It is proven that people with light skins, are best protected when using a SPF 50 sunscreen and upwards. Sunscreen has SPF ranging from 8, all the way up to 70. Depending on your skin tone, it is better to be too careful by protecting with a high number SPF.
What is the minimum SPF to avoid sunburn?
You should wear at least an SPF level of 30 to prevent from being burned. You will also need to reapply as needed throughout the day to maintain the same level of protection.
