Which is the rarest color on national flags ??

  Only two nations out of 196 nations in the world has this colour on their flags   !!!

The colour is     PURPLE .

Only Nicaragua anf Dominica are the nations which are using this colour on their flags.

Purple dye which is used to make purple colour is very costly. 

Purple dye is derived from a sea snail which is present in limited areas. 

Also, making purple dye is labour intensive and take more than 10000 sea snails to make one gram of dye  !!!

The cost of using purple dye on national flags is very high making it rarest colour on national flags .

Kids are always kids !!!

 FIFA worldcup has come to semifinal stage.  Yesterday me and my nephew Aniruddha was having a discussion about this.

Me  :  Aniruddha, FIFA worldcup has come to semifinal stage  !!!

Aniruddha  :  Yes. Out of 48 countries who were there in the beginning only 4 countries are remaining now.

Me :  You were very confident that Brazil is going to be tlhe champion this time.

            Alas !!! Brazil got knocked out in quarterfinals itself  !!!

Aniruddha : I was just hoping .... They were 5 times champions 

Me :  Anyway, whole scenario got changed.

         Now, who do you think could be the champions  ??

Aniruddha  :  No doubt, its England  !!!

Me  :  My bet is on France ....  I have hopes on Argentina too  !!!

Aniruddha  :   Argentina were last time champions...

                          I don't want Argentina to be the champions this time also   !!!

Me  :   What do you think about my choice ....??

Aniruddha  :  It must be England, otherwise Spain 

                         No other countries....

Me  :  But why England  ??

Aniruddha :  Long ago, England was champion.

                         I want atleast this time they become champion.

                          Same for Spain......

Me :   France became champions in 2018.

           According to your logic ,  France must get a chance.....

Aniruddha :  (  Realising that he was caught in his own words  )

                        I don't want to talk about that   !!!!

Phone call was disconnected ........!!!

Places in the world where lightning strikes most ??

  Almost every place listed below sits, where moist tropical air emconters either steep terrain or warm body of water or both. 

It makes the wind to converge over. Here are such places where lightning strikes more per year. 

1.  Lake Maracaibo  ,  Venezuela

2.  Kabare  , Democratic Republic of Congo

3.  Kampene, Democratic Republic of Congo

4.  Caceres  ,  Columbia

5.  Sake  , Democratic Republic of Congo

6.  Dagar,  Pakistan

7.  El Tarra,  Columbia

8.  Nguti  ,  Cameron

9.  Butembo,  Democratic Republic of Congo

10.  Boende  ,  Democratic Republic of Congo

Why the sky is blue and sunsets turn it red ??

 The sky does not have a colour of its own  !!!

When sunlight enters the atmosphere, tiny gas molecules scatter blue wavelength of light strongly than other colours.

This scattered blue light comes from all directions, our eyes perceive the sky as blue  !!!

Although violet light scatters  more strongly than blue light, our eyes are more sensitive to blue light.

That's why sky looks blue.

When the Sun is high on the sky ,  sunlight travels a shorter distance through the atmosphere before reaching our eyes.

These continue travelling through atmosphere and reach our eyes.

But when the Sun is near the horizon like early in the morning or later in the evening, sunlight must pass through a much thicker layer of air..

At this point, most of violet and blue light are scattered away from our eyesight.

What is remaining is longer wavelength of light i. e. reds, oranges and yelows  !!!

Result  :

Colours of the sky are not coming from Sun itself, but from Earth's atmosphere  !!!

Bheja Fry question

 Question

The ratio between father and son age is 17 : 7.

6 years ago,  the ratio was 3  : 1.

What is the current age of father and son  ?? 

Answer

It is given that present age ratio of father and son is 17 :  7.

Let the age of father  17x

Age of son  7x

It is also given that 6 years ago, the ratio of their age was  7 :  1

Let the age 6 years ago, 

Father  17x  - 6

Son         7x  - 6

. 

Their age ratio  3 :  1

( 17 x  -  6 )  :  (  7 x  - 6  )  =   3 : 1

17 x  - 6              3

--------------     =   -----

7 x  -  6                1

Cross multiplying we get

17  x  -  6  =  3  (  7 x  -  6  ) 

17  x  -   6   =   21  x   -   18

21 x  -  17  x   =  - 6  + 18

4 x  =  12

X  =   3

At present, 

Son's age is   7 x  =  7  ×  3  =  21  years

Father's age is   17  x =  17  ×   3  =  51  years