The Theory of Cosmic Grains

By: Fred Sir Hoyle, Nalin C. Wickramasinghe, N. C. Wickramasinghe

Write A Review

Hardcover | 31 October 1991

At a Glance

Hardcover
324 Pages

Dimensions(cm)
25.4 x 17.15 x 1.91

Hardcover

$249.75

or 4 interest-free payments of $62.44 with

Ships in 5 to 7 business days

Light scattering and absorption by small homogeneous particles can be worked-out exactly for spheres and infinite cylinders. Homogeneous particles of irregular shapes, when averaged with respect to rotation, have effects that can in general be well-approximated by reference to results for these two idealised cases. Likewise, small inhomogeneous particles have effects similar to homogeneous particles of the same average refractive index. Thus most problems can be solved to a satisfactory approximation by reference to the exact solutions for spheres and cylinders, which are fully stated here in the early part of the book. The sum of scattering and absorption, the extinction, is too large to be explained by inorganic materials, provided element abundances in the interstellar medium are not appreciably greater than solar, H 0 and NH3 being essentially excluded in the 2 general medium, otherwise very strong absorptions near 3p,m would be observed which they are not. A well-marked extinction maximum in the ultraviolet near 2200A has also not been explained satisfactorily by inorganic materials. Accurately formed graphite spheres with radii close to O.02p,m could conceivably provide an explanation of this ultraviolet feature but no convincing laboratory preparation of such spheres has ever been achieved.

Shipping

	Standard Shipping	Express Shipping
Metro postcodes:	$9.99	$14.95
Regional postcodes:	$9.99	$14.95
Rural postcodes:	$9.99	$14.95

Orders over $79.00 qualify for free shipping.

How to return your order

At Booktopia, we offer hassle-free returns in accordance with our returns policy. If you wish to return an item, please get in touch with Booktopia Customer Care.

Additional postage charges may be applicable.

Defective items

If there is a problem with any of the items received for your order then the Booktopia Customer Care team is ready to assist you.

For more info please visit our Help Centre.

You Can Find This Book In

Non-Fiction Science Astronomy, Space & Time Galaxies & Stars

This product is categorised by

Non-Fiction Science Astronomy, Space & Time Galaxies & Stars

Introduction
Electromagnetic Properties of Small Particles
Interstellar Extinction and Polarisation
Reflection Nebulae and the Diffuse Galactic Light
Interactions between Dust, Gas and Radiation
Inorganic Theories of Grain Formation
The Organic Grain Model
Models of the Extinction and Polarisation of Starlight
Spectroscopic Identifications
Dust in External Galaxies
Index
Table of Contents provided by Publisher. All Rights Reserved.

The Theory of Cosmic Grains

At a Glance

Hardcover

Shipping

How to return your order

Defective items

You Can Find This Book In

More in Astronomy, Space & Time

The First Astronomers

How Indigenous Elders read the stars

A Guide to the Night Sky

The science and lore behind our constellations

The Universe

The Book Of The BBC TV Series Presented By Professor Brian Cox

Outback Astronomer

The extraordinary story of how an amateur astronomer's unwavering passion for the cosmos propelled him from the mines of Broken Hill to working with NASA

Black Holes

The key to understanding the universe

2026 Australasian Sky Guide

Australasian Sky Guide

God, the Science, the Evidence

Little Book, BIG Universe

A Guide to Exploring Australia's Night Skies: Australia Reads

Seven Brief Lessons on Physics

Anniversary Edition

Longitude

Exactly

How Precision Engineers Created the Modern World

2026 Guide to the Night Sky Southern Hemisphere

A month-by-month guide to exploring the skies above Australia, New Zealand and South Africa

Deadly Science - The Solar System

Book 5 2nd Edition

Under the Stars Camping Australia and New Zealand

Lonely Planet

The Return of the God Hypothesis

Three Scientific Discoveries Revealing the Mind Behind the Universe

Stargazing for Beginners

Explore the Wonders of the Night Sky

The Biggest Ideas in the Universe 2

Quanta and Fields

My Big TOE Awakening Discovery Inner Workings

The Complete My Big TOE Trilogy Unifying Philosophy, Physics, and Metaphysics

An Astronaut's Guide to Life on Earth

The Astronomy Handbook

The Ultimate Guide to Observing and Understanding Stars, Planets, Galaxies, and the Universe

A Brief History Of Time

From Big Bang to Black Holes

The Planets

Cosmology and Astrophysics

Magnetic Fields and Star Formation

This product is categorised by