The microtrichia are believed to block stray light from reaching the eyelets in much the same way as matte-surfaced hoods around camera lenses.
But it also carries a coronagraph to block the light from bright objects so it can see more easily nearby, dimmer targets - such as planets circling their stars.
The 2011 storms dumped a torrent of mud and debris into the bay, and that sediment, which can bury grasses and block them from the light they need to grow, is the most likely cause for the 21 percent drop.
Karutz clamped them firmly to my head, tight enough to block out the light.
JVC's approach is to use liquid crystals to block the polarized light that would normally reflect to the screen.
Sandwiching the solar cells inside the device would block some light out and knock down power conversion efficiency even further, Filler cautioned.
Along with getting charged for a street light on his block, the tourists' antics are just one more thing to rub in just how far from normal his life is.
Window coatings that block UV rays also give the option of natural light while minimizing its clothing-fading side effects.
It's pretty rare that a portable solar-based device offers much more utility than impressing your friends, but PiSAT Solar's K-Light won't only make you the coolest kid on your block: it might actually prove useful the next time you take a hike or find yourself hanging out in a developing country.
ENGADGET: PiSAT Solar's K-Light boasts a one-to-one charging ratio
The blaze which killed the two men started in the ninth floor of the tower block in Church Street after a curtain left draped over a light bulb caught fire.
BBC: Shirley Towers fire: No police charges over firemen deaths
The dedicated bayonet lens hood (LH3-01) can be attached to block out extraneous light.
ENGADGET: Sigma DP3 Merrill packs a Foveon X3 sensor and a fixed F2.8, 75mm-equivalent lens
If you're caught you will get sent to D-Block solitary, a tiny cube where days are marked by a light shaft travelling across the wall - or you might be interrogated using techniques only alluded to in the otherwise thorough Alcatraz audio tour, with first-hand accounts by prison guards and prisoners of the Rock.
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