BBC Science The Theory of (nearly) Everything 2019

THE COMPOSITION OF STARS SC IEN CE PH OT O^ L IBR AR Y NEED TO KNOW The spectrum of different stars are shown as horizontal stri ...

THE FUNDAMENTALS OF PHYSICS AD ILN OR CO LL EC TIO N/ WI KIP ED IA, IS TO CK Alhazen’s Book of Optics, a key medieval science te ...

How fast light can travel is a question that scientific minds have been grappling with since ancient Greece. Today we can measur ...

THE FUNDAMENTALS OF PHYSICS AL AM Y 5 distance for the light to travel is less. Hence it arrives relatively early. Conversely, w ...

MEASURING THE SPEED OF LIGHT EARTH SUN JUPITER IO DISTANCE LIGHT TRAVELS In the top diagram, Earth’s orbit around the Sun puts i ...

BR IDG EM AN AR T^ L IBR AR Y,^ S CIE NC E^ P HO TO LIB RA RY ,^ G ET TY 1690 After Ole Rømer shows that light travels at a fini ...

MEASURING THE SPEED OF LIGHT SC IEN CE PH OT O^ L IBR AR Y NEED TO KNOW by FRANK CLOSE (@closefrank) Frank is Emeritus Professor ...

THE FUNDAMENTALS OF PHYSICS GE TT Y THE NATURE OF GRAVITY What goes up must come down... But why that’s the case is a mystery th ...

IN A NUTSHELL The ancient Greeks thought that earth and water were drawn towards the centre of the Universe, then believed to be ...

IST OC K^ X 3 ,^ AL AM Y,^ G ET TY ARISTOTLE (384-322 BC) The definitive ancient Greek philosopher, Aristotle set the agenda for ...

THE NATURE OF GRAVITY SC IEN CE PH OT O^ L IBR AR Y NEED TO KNOW crossing the accelerating spaceship, t he bea m will appea r to ...

THE FUNDAMENTALS OF PHYSICS AK G^ I MA GE S,^ S CIE NC E^ P HO TO LI BR AR Y THE STRUCTURE OF 6JTQWIJQWVJKUVQT[YGoXGGPFGCXQW ...

Scientists have always probed matter to uncover its constituent parts and improvements in our understanding of physics have allo ...

THE FUNDAMENTALS OF PHYSICS SCINTILLATING SCREEN LARGE DEFLECTION RADIOACTIVE SOURCE GOLD FOIL BEAM DEFLECTED BEAM OF ALPHA PART ...

THE STRUCTURE OF THE ATOM SC IEN CE &^ SO CIE TY X^2 ,^ A LA MY X^2 ,^ GE TT Y JOHN DALTON (1766-1844) An English chemist an ...

SC IEN CE &^ SO CIE TY X^2 ,^ N AS A 1803 John Dalton proposes that all matter is made of indestructible atoms; that atoms o ...

THE STRUCTURE OF THE ATOM SC IEN CE PH OT O^ L IBR AR Y Five key scientific terms that will help you understand atoms ALPHA PART ...

THE FUNDAMENTALS OF PHYSICS GE TT French chemist Antoine-Laurent de Lavoisier was Y regarded as the father of modern chemistry T ...

Two millennia after the ancient Greeks wrongly classified the four elements as fire, water, wind and earth, Dmitri Mendeleev unc ...

SC IEN CE PH OT O^ L IBR AR Y,^ S CIE NC E^ & SO CIE TY ,^ A LA MY ,^ G ET TY 5 weights. For instance, the alkali metals lit ...