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...thanks for info.. by Conor74   (Show all posts)
Hi Conor, doing Ke.. by jackill   (Show all posts)
Wife wants to go t.. by Conor74   (Show all posts)
Hello Simon,My nam.. by simon3   (Show all posts)
THIS SATURDAY AUGU.. by Bleck Cra   (Show all posts)
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khkk
2011-08-22 10:53:25
Lasers in the mist
Interesting account of light scattering in mist. Readers of MV will be aware, of course, that although Lord Rayleigh first measured the phenomenon, it was ' In 1859 John Tyndall discovered that when light passes through a clear fluid holding small particles in suspension, the shorter blue wavelengths are scattered more strongly than the red (as in the demonstration above). Later John William Strutt, 3rd Baron Rayleigh, developed equations which approximately describe the behavior of light scattered by small particles and molecules, objects with dimensions much smaller than the wavelength of the radiation in question. Rayleigh's equations predict scattering in terms of the object's size relative to the light's wavelength, and the object's refractive index.'

Check out: http://sxxz.blogspot.com/2007/11/why-is-sky-blue.html
or http://tyndallmountainclub.blogspot.com/ , the site of Kilkenny's Tyndall Mountain Club, which was named to comemorate that illustrious mountaineer & scientist.
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RECENT CONTRIBUTIONS 1 2 3 .. 16 Next page >>
Track
Shefy Knockboy
Ulsterpooka 13 hours ago.
walk, Len: 39.0km, Climb: 1287m, Area: Lackabaun, Shehy/Knockboy (Ireland) Lack...

  
Forum: General
MOUNTAINVIEWS MEMBERS MEET APRIL 2018
liz50 2 days ago.
It is this Saturday 28th April! Visiting some of the lesser know summits in the Galtees, including Temple Hill and Lyracappal. If you would like to join us please contact Liz at elizabethashton201...

  
Summit Comment
Galtybeg: One of those rare perfect days
jackill 2 days ago.
Every once in a while comes a rare day when everything just works, even though it shouldn't.Dodgy back, banjaxed knees, starting time silly o'clock, have to be home by noon to evict the crows from...

Track
Nephin from the North....stunning views.
derkelly274 3 days ago.
First time climbing Nephin for both myself and my friend. We decided to go at it from the North as it seemed like a more walk, Len: 5.3km, Climb: 644m, Area: Nephin, North Mayo (Ireland) Nephin

  
Summit Comment
Lugduff: A high point on long ridge separating Glendalough from Glenmalure
Bunsen7 2 days ago.
This picture is taken pretty much directly to the west of Lugduff across Glenmalure on an approach to Camenabologue SE Top.Most people will probably take in Lugduff as part of a circuit of Glendal...

  
User profile
derkelly274
derkelly274 3 days ago.
Enjoy climbing the odd hill. Hope to visit more and more.

Summit Comment
Camenabologue SE Top: Direct Route from Glenmalure
Bunsen7 2 days ago.
Followed directions posted on MV to find the forest ride up from Glenmalure. See track 3766.The first section of forestry SW of the forest track has been felled, making the forest ride more obviou...

  
Track
Camenabologue SE
Bunsen7 5 days ago.
This shortish alternative track makes use of a forest ride (as heralded by Simon3) from Glenmalure to reach Camenabol... walk, Len: 10.6km, Climb: 664m, Area: Camenabologue SE Top, Dublin/Wicklow (Ir

  
Forum: General
An Alp for OAPs...
Colin Murphy a week ago.
If you an ageing hillwalker like myself who might have liked to bag an ‘Alp’ but are too long in the tooth to contemplate such an adventure, fear not, there is a simple little Austrian Alp you can...

Summit Comment
Bealick: Between two counties
Wilderness 3 days ago.
I approached this mountain from the North East ,coming from the Coomataggart mountains. When I got to the top I had to walk around for a few minutes to pinpoint the true summit; which I'm sure is...

  
Track
Mullaghcleevaun circuit
osullivanm 5 days ago.
A very pleasant circuit although some difficult ground between Duff Hill and the return to start of hike. walk, Len: 17.3km, Climb: 792m, Area: Black Hill, Dublin/Wicklow (Ireland) Blac...

  
Summit Comment
Nephin: A looped climb from the North. Stunning views all around!
derkelly274 3 days ago.
First time climbing Nephin for both myself and my friend. We decided to go at it from the North as it seemed like a more interesting prospect. There was access to the woods on the northern slope o...


RECENT CONTRIBUTIONS 1 2 3 .. 16 Next page >>