physics

Roy Henry Garstang

Roy Henry Garstang is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Roy Henry Garstang rather than just read about it. In short: Roy Henry Garstang (1925–2009) was an English astrophysicist who was internationally known for his work on light pollution. Family and early life Garstang was born in Southport, England in September 1925 to Percy Brocklehurst and Eunice (Gledhill) Garstang.

Key takeaways

Roy Henry Garstang belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Roy Henry Garstang to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Roy Henry Garstang from memory before moving on to harder problems.

Reference excerpt

Roy Henry Garstang (1925–2009) was an English astrophysicist who was internationally known for his work on light pollution.

Family and early life Garstang was born in Southport, England in September 1925 to Percy Brocklehurst and Eunice (Gledhill) Garstang. He attended Cambridge University on a Caius College scholarship. Due to the war, he completed three years of course work in two years, ultimately receiving his B.A. in 1946. He spent 1945 to 1946 as scientific officer at the Royal Aircraft Establishment at Farnborough, England and 1946 to 1948 as scientific officer at the Ministry of Works. Returning to Cambridge, he pursued his studies in mathematics receiving an M.A. in 1950 and his Ph.D. in 1954, under the supervision of D.R. Hartree. His thesis examined atomic transitions in astrophysics. He also received a Sc.D. from Cambridge in Physics and Chemistry in 1983.

Early work Garstang started working at the Yerkes Observatory while he was still enrolled in the Ph.D. program at Cambridge. During that time, he began to calculate atomic structures and transition probabilities for forbidden transitions, which was of special interest to astrophysicists. Upon the completion of his Ph.D., he started teaching at the University of London and served as the assistant director for the London Observatory. He also edited The Observatory magazine from 1953 through 1960. In 1964, Garstang headed to Boulder, Colorado to join the faculty at the University of Colorado, Boulder. Soon after arriving, he was appointed Chairman of the Joint Institute for Laboratory Astrophysics. He also served as the Director of the Division of Physics and Astro-Geophysics from 1979 to 1980 and the acting Director of the Fiske Planetarium from 1980 to 1981. During his career, he published over 50 papers, including calculations on neutral technetium and line strengths for ionized neon. He also calculated the energy levels and spectra of highly ionized species of iron, and spent time studying the effects of strong magnetic field on atomic spectra, ranging from the thousand gauss fields of sunspots to megagauss fields of white dwarfs.

Late career Later in his career, Garstang began to work on light pollution. Between 1984 and 2007, he published 40 scientific papers concerning the phenomenon, and constructed a light pollution model which included an ozone layer, scattering of light by molecules and aerosols with improved variations with altitude, curvature of the Earth, and a dust layer of dust either volcanic or desert origin. The models he created have since become standard in the field, and led to efforts to reduce light pollution in urban areas.

References

External links

Archival collections Roy Henry Garstang student notebooks, 1943-1951, Niels Bohr Library & Archives

Worked examples

Example 1 — a first encounter with Roy Henry Garstang

Start with the simplest possible case. Write down what Roy Henry Garstang claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Roy Henry Garstang before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Roy Henry Garstang ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Roy Henry Garstang

In research: Roy Henry Garstang appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Roy Henry Garstang in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Roy Henry Garstang is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1925 births, 2009 deaths, Alumni of the University of Cambridge, so understanding it makes those chapters shorter.
In everyday life: Look for Roy Henry Garstang outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Roy Henry Garstang” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Roy Henry Garstang in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Roy Henry Garstang means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Roy Henry Garstang out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Roy Henry Garstang in simple terms?

Roy Henry Garstang (1925–2009) was an English astrophysicist who was internationally known for his work on light pollution. Family and early life Garstang was born in Southport, England in September 1925 to Percy Brocklehurst and Eunice (Gledhill) Garstang.

Why does Roy Henry Garstang matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Roy Henry Garstang?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Roy Henry Garstang.