There should be a White Screen Mode for the iPad so that it can be used as a mini light table for pencil tracing images and viewing slides etc. Other pure colours could be selected; eg pure red for dark rooms etc.-- xenzag, Feb 11 2019 Ever since my wife made me put the glass fridge shelf back I use my computer screen as a light table a lot. (+)-- 2 fries shy of a happy meal, Feb 11 2019 Could you not simply take a photo of a white surface (or a red surface, &c.) and then display it full-screen on the iPad?-- MaxwellBuchanan, Feb 11 2019 You can just click on an image for the word white or any other color for an 'almost' full screen.-- 2 fries shy of a happy meal, Feb 11 2019 Presumably, on the iPad you can zoom the screen (like on a Mac), so even if you can't get true "full screen" you can still get an actual screenful.-- MaxwellBuchanan, Feb 11 2019 [Ian Tindale] that is awesome, especially in it's improvisationalness!-- neutrinos_shadow, Feb 11 2019 You can also go to about:blank in any web browser and then go fullscreen, at least on a "computer" computer.-- notexactly, Feb 11 2019 //make iPad able to display a pure white screen
Tippex or some white paper?
But seriously, if you could drag the light towards the UV end,you'd be able to see the pink-fluorescing flying squirrels.
Probably bad home-brew vodka might have the same effect.-- not_morrison_rm, Feb 12 2019 Can we also ask for a UV blacklight mode? That would come in quite handy for assorted reasons, like making stuff glow. Or, umm, making other stuff glow, you know, like old posters from the sixties and seventies.
Oh, you can also use UV light to check for rodent activity in and around your home. Blacklight will illuminate those areas where the cheeky little vermin have been relieving themselves after getting drunk at the wild parties they throw in your basement. Just don't use it in your spare bedroom after your creepy brother-in-law has spent the night.
And I nearly forgot, you can also use UV blacklight to check for counterfeit money!-- Canuck, Feb 13 2019 Yes - along with many other "solid" colours as indicated in idea.-- xenzag, Feb 13 2019 random, halfbakery