# William Lawrence Bragg

> Australian-born British physicist and X-ray crystallographer

**Wikidata**: [Q131729](https://www.wikidata.org/wiki/Q131729)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Lawrence_Bragg)  
**Source**: https://4ort.xyz/entity/william-lawrence-bragg

## Summary
William Lawrence Bragg was an Australian-born British physicist and X-ray crystallographer, widely recognized for his foundational contributions to the field of X-ray diffraction. He is best known for formulating Bragg's law and pioneering the use of X-rays to determine the atomic structure of crystals, work for which he was awarded the Nobel Prize in Physics in 1915 at the age of 25.

## Biography
- Born: 31 March 1890, Adelaide, Australia
- Nationality: British (later in life)
- Education: 
  - Educated at St Peter's College, Adelaide
  - The University of Adelaide
  - Trinity College, Cambridge
  - University of Cambridge
- Known for: Formulating Bragg's law and pioneering X-ray crystallography
- Employer(s): 
  - University of Cambridge
  - University of Manchester (Victoria University of Manchester)
  - Australian National University
  - University of Leeds
- Field(s): Physics, X-ray crystallography, crystallography

## Contributions
William Lawrence Bragg co-formulated **Bragg's law** in 1913 with his father, William Henry Bragg, which describes the diffraction of X-rays by crystal lattices. This work laid the foundation for the field of X-ray crystallography and earned them the **Nobel Prize in Physics in 1915**. He also contributed to the development of early computing techniques and was a pioneer in using X-ray diffraction to study crystal structures.

## FAQs
### What is William Lawrence Bragg known for?
William Lawrence Bragg is best known for co-formulating **Bragg's law**, which explains the diffraction of X-rays by crystal lattices. This work was foundational in the development of X-ray crystallography and earned him a Nobel Prize at the age of 25.

### What did William Lawrence Bragg win the Nobel Prize for?
He won the **Nobel Prize in Physics in 1915** for his work with his father, William Henry Bragg, on the diffraction of X-rays by crystals, which led to the formulation of **Bragg's law**.

### Where did William Lawrence Bragg work?
He worked at the **University of Cambridge**, the **University of Manchester (Victoria University of Manchester)**, the **Australian National University**, and the **University of Leeds**.

### What is Bragg's law?
Bragg's law gives the angles for coherent and incoherent scattering from a crystal lattice and is fundamental to X-ray crystallography. It is expressed as **nλ = 2d sin θ**, where **n** is the order of reflection, **λ** is the wavelength, **d** is the distance between atomic planes, and **θ** is the angle of incidence.

### What did William Lawrence Bragg study?
He studied **X-ray diffraction** and **crystallography**, using X-rays to determine the atomic structure of crystals, which was revolutionary in advancing the understanding of molecular structures.

### What awards did William Lawrence Bragg receive?
He received numerous awards, including the **Nobel Prize in Physics (1915)**, the **Copley Medal (1930)**, the **Royal Medal (1949)**, the **Davy Medal (1950)**, and the **Hughes Medal (1931)**, among others.

### What was William Lawrence Bragg's early education?
He was educated at **St Peter's College, Adelaide**, and later studied at the **University of Adelaide** and **Trinity College, Cambridge**.

### What was William Lawrence Bragg's role in the development of X-ray crystallography?
He played a pivotal role in developing **X-ray crystallography** by co-formulating **Bragg's law** with his father, which enabled the study of atomic structures through X-ray diffraction.

## Why They Matter
William Lawrence Bragg fundamentally transformed the field of structural science by co-developing **Bragg's law**, which became the cornerstone of **X-ray crystallography**. His work enabled scientists to determine the atomic structure of crystals, laying the groundwork for molecular biology, chemistry, and materials science. His early contributions were instrumental in the development of the **DNA double helix model** and the advancement of **X-ray spectroscopy**. Bragg's law remains a fundamental principle in the study of crystalline structures and has influenced countless scientific discoveries.

## Notable For
- Co-formulating **Bragg's law** with his father, William Henry Bragg
- Pioneering the use of X-rays to determine atomic structures
- Being the youngest person to win the **Nobel Prize in Physics** (at age 25)
- Receiving the **Nobel Prize in Physics (1915)** for his work on X-ray diffraction
- Founding and leading the field of **X-ray crystallography**
- Being a member of the **Royal Society** and receiving the **Copley Medal (1930)**, **Royal Medal (1949)**, and **Davy Medal (1950)**
- Serving in **World War I** and being awarded the **Military Cross**
- Advancing the study of crystallography through his work at the **University of Manchester**, **University of Cambridge**, and **Australian National University**

## Body

### Early Life and Education
- Born in Adelaide, Australia, on 31 March 1890
- Studied at **St Peter's College, Adelaide**
- Attended the **University of Adelaide**
- Moved to England and studied at **Trinity College, Cambridge**
- Earned a degree in physics and mathematics from the **University of Cambridge**

### Career
- Collaborated with his father, William Henry Bragg, to develop **Bragg's law** in 1913
- Worked at the **University of Cambridge**, **University of Manchester** (specifically **Victoria University of Manchester**), and **Australian National University**
- Served in **World War I** and was awarded the **Military Cross**
- Became a **Fellow of the Royal Society**
- Received the **Copley Medal (1930)**, **Royal Medal (1949)**, and **Davy Medal (1950)**

### Contributions to Physics
- Co-formulated **Bragg's law** with his father, which describes the diffraction of X-rays by crystal lattices
- Pioneered the use of X-ray diffraction to determine the atomic structure of crystals
- His work laid the foundation for **X-ray crystallography**, which later enabled the study of complex molecular structures like DNA

### Awards and Recognition
- Awarded the **Nobel Prize in Physics** in 1915
- Received the **Copley Medal** in 1930
- Awarded the **Royal Medal** in 1949
- Honored with the **Davy Medal** in 1950
- Became a **Fellow of the Royal Society**
- Awarded the **Military Cross** for his service during World War I

### Legacy
William Lawrence Bragg's work in **X-ray crystallography** revolutionized the understanding of molecular structures. His contributions enabled the development of **structural biology** and **materials science**. Bragg's law remains a fundamental principle in physics and chemistry, and his influence is evident in the development of the **DNA double helix model** and the advancement of **X-ray spectroscopy**. His legacy continues to impact scientific research and education, with his methods being used in various fields such as medicine, geology, and materials science.

### Influence
Bragg's work laid the groundwork for the development of **X-ray crystallography**, which has been used to determine the structure of countless compounds, including **vitamin B12**, **penicillin**, and **DNA**. His influence on the scientific community is evident in the numerous awards and honors he received, including the **Nobel Prize in Physics**. His methods have been used to study the structure of proteins, leading to significant advances in medicine and biology. Bragg's law is still used today in the study of crystal structures and has influenced the development of new materials and drugs.

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