Chemical physics personal statement example

Why do you want to study this course or subject?

The bus stop near my house is lit by one of the last sodium lamps on our road, and on dark winter mornings its orange glow looks flat beside the white LEDs that have replaced the others. Last year I wanted to know why, so I built a spectroscope from a cereal box, a slit cut between two razor blades and a piece of broken DVD. Through it the sodium lamp gave an almost single bright yellow band, while the LED gave a sharp blue peak and a broad smear of yellow-green. That contrast is what draws me to chemical physics. The sodium line reflects the electron energy levels of a single atom, while the LED's broad glow comes from a phosphor, a solid in which the surroundings of each emitting centre blur the energies. Explaining both properly needs quantum mechanics, thermodynamics and an understanding of real materials. I want a degree that treats chemistry and physics as one subject rather than two neighbours. I enjoy questions where a mathematical model has to meet a messy measurement, and I want to learn the tools, from spectroscopy to statistical mechanics, that make that possible.

How have your qualifications and studies helped you to prepare?

I study Chemistry, Physics and Mathematics at A level. In physics, the topic on photons and energy levels gave me E = hf and the idea that line spectra are fingerprints of atomic structure, so I calibrated my spectroscope by photographing the fluorescent tube in our kitchen and using its mercury lines near 436 nm and 546 nm as reference points. I measured pixel positions on my phone images, fitted a straight line in a spreadsheet and estimated the sodium feature at about 590 nm, close to the accepted 589 nm doublet, which my set-up could not resolve. Working out why, from the slit width and the DVD's track spacing, taught me more about diffraction than textbook problems had. In chemistry I most enjoy energetics and kinetics, especially an iodine clock practical where I plotted an Arrhenius graph and found that steady temperature control mattered more than working quickly. Reading Why Chemical Reactions Happen by Keeler and Wothers showed me how molecular orbitals explain bonding that A level describes only in outline, and Feynman's QED gave me a first, honest picture of how strange the behaviour of light really is. In mathematics, calculus and logarithms have stopped feeling like separate techniques and started to feel like the language of rates.

What else have you done to prepare outside of education, and why are these experiences useful?

For two years I have worked Saturday shifts at a family bakery, starting at six. I weigh dough and run the proving cabinet, and I learned quickly that a few degrees' difference in the back room changes how fast bread rises, so I now check the thermometer before trusting the timer. The owner trusts me to open up with one other member of staff, and I show newer weekend workers how to use the scales and the till. On weekdays I walk my two younger cousins to primary school because my aunt starts work early, which has made me organised about my own mornings and patient with constant questions about why the sky changes colour. Trying to answer those properly is harder than it sounds. I also play in a Sunday five-a-side league and keep the team's subs and fixtures on a shared spreadsheet. None of this is laboratory work, but it has given me reliability, stamina and the habit of noticing small changes. My school has no physics club, so I have learned to find my own questions and work through them steadily, using free lecture notes and online simulations when I get stuck. I am ready for the pace of a demanding degree and keen to work alongside people who find these questions as absorbing as I do.