Advanced search

Tag 'tv' details


Be informed on updates to this list by RSS


9 matches found


Why can my webcam see my remote controller signal but I can't?

Whilst having an e-chat with my girlfriend I jokingly pointed my TV remote controller at the webcam and pressed the mute button. To my surprise I could see the small bulb on the front of it flashing. When I looked at the bulb directly and pressed the buttons I couldn't see any flashing. Why is this?

sssss
 (no votes)

There are 4 answer(s) for this question. View answers | Submit an answer

  • Asked by NickD
  • on 2010-09-23 21:38:09
  • Member status
  • none

Categories: Domestic Science.

Tags: tv, remotecontroller.

 

Report abuse

How live is live TV?

I've always been spectical about the principle of "live" TV, I understand that it will be a matter of seconds but how "live" is live TV.

sssss
 (no votes)

There are 3 answer(s) for this question. View answers | Submit an answer

  • Asked by LukeS
  • on 2010-09-22 20:40:49
  • Member status
  • none

Categories: Technology.

Tags: technology, tv, tech.

 

Report abuse

Why do beams of light go up and down from a TV when I look at it?

What I mean is, when looking at a TV, the old ones not flat screens, I get light looking as though it is going out of the TV and upwards and also it is coming out of the bottom of the TV.

This also happens when looking at streetlights, kind of like the childrens drawings of the circular Sun and the rectangular beams of light stretching out.

Also, these 'beams' don't go on for too long, can't gauage the distance because it seems to be realative. The light also is the same colour as ones that are on the TV screen.

sssss
 (no votes)

There are 1 answer(s) for this question. View answers | Submit an answer

  • Member status
  • none

Categories: Human Body.

Tags: light, Eyes, tv.

 

Report abuse

Television signals include colour information, so why does the white noise or "snow" always show up as white?

Everyone is probably familiar with the white noise or snow that can appear on an analogue television screen. I know this comes from electronic noise and stray electromagnetic signals, but television signals encode colour information, so how come this random noise always shows up as white?

Jack Bishop, Redditch, Worcestershire, UK

Editorial status: In magazine.

sssss
 (no votes)

There are 5 answer(s) for this question. View answers | Submit an answer

  • Member status
  • none

Categories: Technology, Unanswered.

Tags: colour, television, tv, whitenoise, white.

 

Report abuse

tv reception in tenerife

why is tv reception of english channels so variable in tenerife canary islands

sssss
 (no votes)

There are 1 answer(s) for this question. View answers | Submit an answer

  • Asked by davidlee
  • on 2010-02-16 20:18:17
  • Member status
  • none

Categories: Technology.

Tags: tv.

 

Report abuse

Tv remotes stop and start working simultaneously

I turned my tv on this morning to find that none of the remotes worked, (digi box and tv) then after two minutes both started working at the same time, I was wondering what could have caused this.

sssss
 (no votes)

There are 1 answer(s) for this question. View answers | Submit an answer

  • Member status
  • none

Categories: Technology.

Tags: tv, RemoteControl.

 

Report abuse

Tv remotes stop and start working simultaneously

I turned my tv on this morning to find that none of the remotes worked, (digi box and tv) then after two minutes both started working at the same time, I was wondering what could have caused this.

sssss
 (no votes)

There are 0 answer(s) for this question. View answers | Submit an answer

  • Member status
  • none

Categories: Technology.

Tags: tv, RemoteControl.

 

Report abuse

Does Schrodinger Cat work on Deal or No Deal?

I was pondering Schrödinger’s Cat while watching “Deal or No Deal”.  Now, it occurs to me at this point that the readers of this journal are more likely to need an explanation of what “Deal or No Deal” is, rather than any enlightenment as to the mysteries of Schrödinger.  Nonetheless, I intend to assume the reader has intrinsic knowledge of both topics – go ‘Google’ if you don’t!

My ponderings lay not with the misguided folk who are convinced they have a plan to ‘beat the banker’ because the box they have bears the same number as their birthday, but rather with the possible complexities of what I will call Schrödinger’s Cash.    

So, let us imagine the way things happen at the moment.  Before the show just one person is responsible for putting the monetary values, from 1p to £250,000 (substitute your own currency depending on where you live) into the boxes numbered 1 to 22.  At this point he is the only person in the universe who knows which value is in which box – and of course during game play selecting the box and accepting the bankers deal is simply statistics.  Box ‘n’ has always, and will always, contain value ‘x’ and every contestant has a 1 in 22 chance of having any particular value in their box.  It doesn’t matter in which order the boxes are opened, these facts will never change and the value ‘y’ in the contestants box will always be the value ‘y’.

Now imagine, if before the show, the 22 boxes do not have a number in their initial state (this may be the case, I don’t know – but I doubt it) so all the boxes are identical, blank and indistinguishable from one another.  The boxes are lined up on a long shelf, in a sealed room where only one person at a time is permitted to enter.  The first person still has the responsibility to put monetary values into the boxes at random and then seal each box.   Once this is done, he leaves the room and a second person enters.  Then, at random, the second person randomly allocates each box a number so the boxes now have numbers from 1 – 22. 

In my view, all these boxes now have Schrödinger’s Cash inside them.  No one in the universe now knows which value (state) any numbered box contains until the box is opened.

However, this now takes my (very) limited understanding of Erwin Schrödinger’s hypothesis beyond breaking point. But that’s just me I hope.  Undoubtedly someone reading this has far superior understanding and can offer further comment on the following points.

Firstly, each box has 22 possible states – and by thought experiment this logic can be extended to an infinite amount of possible states in an infinite amount of boxes were used.  However, once one box is opened and its value (state) ascertained the other states do not change (as with Schrödinger’s Cat) because there are an infinite number of boxes – as infinity minus 1 is still infinity.   Even with a less than infinite number of boxes (lets say 22) once one box is opened the other boxes still have unknown (albeit diminished optional) states.

Now lets consider a variation.  None of the boxes have to be opened in order to change all of their states to a known value.  All that needs to happen is that ‘person one’ talks to ‘person two’ and says “I put the values in the boxes left to right along the shelf in this order…..” whereby  ‘person two’ says “I put the numbers on the boxes left to right in the this order….”.  Now, so long as neither were lying,  person one and person two both know the state of every box but none have been opened.  And to get round the possibility of either person being a scallywag, each person video tapes their time in the sealed room with the boxes so that it clearly shows what they did, but they do not show this recording until they want to collapse the possible states of each box to a known value.

Finally, does this new method of loading the boxes with Schrödinger’s Cash change the statistics of the game?  I doubt it, but does it make me wonder how you would explain to Noel Edmonds (substitute your country’s quizmaster) that the final two boxes both contained (say) 10p and £250,000.

 

sssss
 (no votes)

There are 1 answer(s) for this question. View answers | Submit an answer

  • Asked by wutty
  • on 2009-11-10 00:38:13
  • Member status
  • none

Categories: Our universe.

Tags: tv, quantum, Statistics, gameshow, SchrdingersCat, Schrdinger.

 

Report abuse

Do pain relief ads cause pain?

I found the ad's that promote pain relief (notably for headaches) tend to be very bold (black and white), have flashing lights, repetative noises or other things that stimulate a sore noggin.  Is this on purpose?

sssss
 (no votes)

There are 0 answer(s) for this question. View answers | Submit an answer

  • Asked by Deko
  • on 2009-07-24 21:12:21
  • Member status
  • none

Categories: Human Body.

Tags: pain, tv, advert, headaches, relief, aspirin, ads.

 

Report abuse

9 matches found


The last word is ...

the place where you ask questions about everyday science

Answer questions, vote for best answers, send your videos and audio questions, save favourite questions and answers, share with friends...

register now


ADVERTISMENT