Apple Watch: You can now check the UV Index on your watch. Tap and hold to view todays peak UVI, just as in the iOS app. The watch app also contains a My Skin section and 4 day hourly forecast.
How does Apple Watch detect UV?
Apple’s patent describes a system where UV light sensors detect sunlight and track exposure over time. … The data from the sensors is fed into an analyser that compiles the total exposure time and how much UV light the user has been exposed to and then alert the user.
Is Apple weather UV Index accurate?
We took over 200 readings in various weather situations, at different times of the day. Results showed that the UV Index forecast was only accurate 18% of the time, while the Shade UV sensor was accurate more than 90% of the time.
Can iPhone detect UV?
A standard smartphone camera cannot detect UV or IR as only the visible light spectrum is allowed. You can check out this device from Nurugo but it is not compatible with an iPhone yet.
How do I get UVI on my Apple Watch?
To find this metric in the wearable, search for a new watch face under the Face Gallery tab of the Watch app and look for the little sun icon with a number floating somewhere around it (or, you can simply check the weather app). Once you know the number, consult the World Health Organization (WHO) breakdown.
What is Apple Watch UVI?
The app will instantly show the current UV Index (UVI) at your location in an intuitive way. Tap and hold to see the peak UV Index for today. You can also see when the Sun rises and sets, and at what time the UV Index is at its highest level.
How long does it take to burn in UV 7?
Example of UV Index Forecast
|UV Index Number||Exposure Level||Time to Burn|
|8||Very High||15-25 minutes|
What UV level is safe?
UVI 1-2 is low, which generally means it’s safe to be outdoors unprotected. Other classifications are moderate (3-5), high (6-7), very high (8-10) and extreme (11+). To some extent, the moderate to very high labels tell us little except that UV intensity is increasing.
What time is UV highest?
The maximum UV level on any given day occurs during the four-hour period between 10 a.m. and 2 p.m., a timeframe scientists refer to as ‘solar noon.
What UV is good for tanning?
TABLE 1. MINUTES OF SUNLIGHT EXPOSURE FOR SUFFICIENT VITAMIN D
|SKIN REACTION TO SUNLIGHT||UV Index|
|Skin type III: Occasionally burn, slowly tan||20-30 min.||10-15 min.|
|Skin type IV: Rarely burn, rapidly tan||30-40 min.||15-20 min.|
|Skin type V & VI: Very rarely burn, always dark||40-60 min.||20-30 min.|
Can smartphone detect UV light?
ABSTRACT. Smartphones have the potential to monitor ultraviolet radiation within the terrestrial solar spectrum. … Previous studies have demonstrated the detection of ultraviolet A from 320 to 400 nm with a smartphone.
Can a phone camera see ultraviolet?
Since CMOS sensors in mobile phone cameras are very sensitive to UV, mobile phones have potential to be ideal equipment to measure UV radiance. … Later, a procedure that can be implemented in mobile phones was provided. Furthermore, an Android app called UV Meter was developed based on the procedure.
What does UV Index mean on Apple Watch?
UV Watch – Reduce your skin cancer risk with up to the minute UV Index forecasts on the face of your Apple Watch or iOS device. Control exposure with alarms when the Index rises above/falls below your safe zone. … UV Watch predicts the UV Index based on internet weather forecast data for your current location.
What is the highest UV Index possible?
UV Index Scale
- 0 to 2: Low. A UV Index reading of 0 to 2 means low danger from the sun’s UV rays for the average person. …
- 3 to 5: Moderate. A UV Index reading of 3 to 5 means moderate risk of harm from unprotected sun exposure. …
- 6 to 7: High. …
- 8 to 10: Very High. …
- 11 or more: Extreme.
Can UV Index predict?
The U.S. National Weather Service calculates the UV Index using a computer model that relates the ground-level strength of solar ultraviolet (UV) radiation to forecasted stratospheric ozone concentration, forecasted cloud amounts, and elevation of the ground.