The Blog

Wednesday, February 22, 2006


1. Why do we have round poles for telephone wires and "I" cross section poles for wires used for transmission of electricity?
2. Why is Red color use to indicate stop (traffic) signal?
3. Why fog lights are Yellow?
4. One can see Cable TV wires that run from terrace to terrace in the neighbourhood. If these adjacent terraces are as apart as 60-70 feet, how do they put these wires in place from one terrace to another. (Helicopter - is not a valid answer)
5. You are stationary and an object comes towards you travelling 'p' times the speed of light what would you see?

Edit: Answers posted in comments section.

Last reading: Lord of the rings (Part I)
Current reading: Harry Potter - The order of the phoenix


At 2/27/2006 09:19:00 PM, Blogger tmww said...

Nice questions maaaan!!
And I aint know nothin' maaan..

Waiting eagerly for the answers!

At 3/01/2006 12:15:00 AM, Blogger Mahesh said...

1. "I" cross section poles provide greater resistance to wind forces when applied on the shorter edges of "I". I think it will be great to have them for telephone wires too, but will increase cost.

2. The red light is refracted less than other colours.

3. Same as (2). Red cannot be used because it is used for stop signs. So yellow is next in the order.

4. One can hang a rope from one terrace to the ground and one can hang wire from the other. Then, on the ground you tie the rope and the wire. And pull the rope up from the terrace from which it was hung.

5. Given 'p' is sufficiently large (say 4-5), I think one would see the object moving away from us. Correct me if I am wrong.

At 3/02/2006 04:29:00 AM, Blogger tmww said...

(We pressume that object can move faster than the speed of light which it actually cant. But we assume)

Wont you see the object after it has gone past you?
And from that instance onwards you will see the object moving towards you at the speed of light!! (I am a bit confused now)
Though we will be increasingly looking in the past.. as in, the time between our catching the glimpse of the object and the actual position of the object at that time will go on increasing.

But I dont understand why you say that it will be moving away from us..
tu kaay boltos?

At 3/02/2006 04:58:00 AM, Blogger tmww said...

chamkaa chamkaa..

the object will appear to go back..

At 3/03/2006 02:57:00 AM, Anonymous ajay said...

5. You will see stars (because the object will hit you before you see it!) :D

At 3/08/2006 09:57:00 PM, Blogger Mahesh said...

Ajay: LOL, I didn't realize this.

tmww: you are the mann!!


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