I just wonder why Kasumi believes a shirt and pants are somehow less hot than a swimsuit. It should be the reverse.
Oooh! (puts on physics professor glasses)
Actually, there are three mechanisms at play controlling how hot you feel when out on the beach: evaporation, radiation absorption, and conductive heat transfer.
Evaporation is a cooling process, which is why your body uses it to sweat out excessive heat. For evaporation through sweating, less clothes is better, but if you're going to be getting wet at the beach, the clothes hold water, which then evaporates slowly, which can produce a cooling effect. (this is why wet clothes will leave you feeling chilled)
For radiation absorption, the lighter the color of the surface the sunlight hits, the more is reflected, and therefore the less heat is transferred into the body. Also, the clothing provides a barrier against direct absorption, so there's an extra boundary between you and the clothes, which in extreme cases can actually be very effective at keeping you cooler. Bedouins wear heavy robes in the desert for this reason. The robes actually insulate you from the heat outside. Of course, for thin garments like Kasumi is wearing, this effect is negligible, but the white top probably does a pretty good job of reducing heat absorption by reflecting the sunlight away. (It also traps some of her body heat, but if the fabric is thin enough, it helps more than it hurts)
Conductive heat transfer is through her contact with the surrounding air. At a beach, there's probably a generous breeze of cool air coming in off the ocean during the day, which will help in either case, though moreso if your clothes are made of a light fabric that breathes.
In conclusion, When the sun is high and bright, and you're gonna be splashing around at the beach, a nice brightly colored t-shirt made of a light fabric can actually be cooler than even the skimpiest bikini.
last edited at Jul 20, 2019 10:18PM
