Skip to main content
  • What's on
  • Learning
  • Explore science
  • Christmas Lectures
  • Visit
  • Support us
  • About us
Become an Ri Member
Become an Ri Member
Video George Porter pointing at a rainbow beam of light on a white screen
Chemistry CHRISTMAS LECTURES Physics

The natural history of a sunbeam – First light (1976)

Sir George Porter takes an in-depth look at how light is structured.

The natural history of a sunbeam – First light (1976) Read more
Video a hand pointing at a piece of paper that has a vertical wobbly line
CHRISTMAS LECTURES

Signals from the interior – Signals from the mind (1975)

Heinz Wolff explores the signals we receive and send out about our emotional and mental states.

Signals from the interior – Signals from the mind (1975) Read more
Video A still from the 1975 CHRISTMAS LECTURES
CHRISTMAS LECTURES

Signals from the interior – Looking through your skin (1975)

Heinz Wolff explores the ways in which electromagnetic radiation and ultrasounds enable us to investigate the inside of a body.

Signals from the interior – Looking through your skin (1975) Read more
Video Heinz Wolff  speaking at the Ri theatre
CHRISTMAS LECTURES

Signals from the interior – Probes, sondes and sounds (1975)

Heinz Wolff looks at the ways in which we can discover what's happening in our digestive tract.

Signals from the interior – Probes, sondes and sounds (1975) Read more
Video Heinz Wolff  speaking at the Ri theatre
CHRISTMAS LECTURES

Signals from the interior – Spikes and waves (1975)

Heinz Wolff explores what we can learn from how our body conducts electricity.

Signals from the interior – Spikes and waves (1975) Read more
Video Heinz Wolff putting his finger in a contraption that looks like a cigar cutter
CHRISTMAS LECTURES

Signals from the interior – Pumps, pipes and flows (1975)

Heinz Wolff explores the ways in which we find can out how much blood the heart is actually pumping and how efficiently it does

Signals from the interior – Pumps, pipes and flows (1975) Read more
Video Heinz Wolff standing next to a contraption with a drawn-on face
CHRISTMAS LECTURES

Signals from the interior – You as an engine (1975)

Heinz Wolff demonstrates how to measure the efficiency of the human engine, comparing it with that of a petrol-driven generator.

Signals from the interior – You as an engine (1975) Read more
Video A sketch of a walrus and a man in a top hat by the sea
CHRISTMAS LECTURES Physics Technology and engineering

The engineer through the looking glass – The time has come the Walrus said (1974)

Eric Laithwaite uses the concept of analogies (fairy stories) as a way to explain complex topics in science including objects

The engineer through the looking glass – The time has come the Walrus said (1974) Read more
Video Eric Laithwaite speaking to a group of children iin the Ri theatre
CHRISTMAS LECTURES Physics Technology and engineering

The engineer through the looking glass – The Jabberwock (1974)

In this controversial Lecture, Laithwaite used behavioural gyroscopes in an attempt to challenge the validity of Newton’s Laws

The engineer through the looking glass – The Jabberwock (1974) Read more
Video Eric Laithwaite in his 1974 CHRISTMAS LECTURE
CHRISTMAS LECTURES Physics Technology and engineering

The engineer through the looking glass – Jam yesterday, jam tomorrow (1974)

Through the title of this third lecture and the theme of chess running through Alice's adventures, Eric Laithwaite introduces

The engineer through the looking glass – Jam yesterday, jam tomorrow (1974) Read more

Pagination

  • Previous page ‹‹
  • Page 32
  • Next page ››
Back to top

Subscribe to The Ri Newsletter

Sign up now

About the Ri

The Royal Institution is an independent charity dedicated to connecting people to the world of science.

Contact us What we do

About us    Jobs

Venue hire

Make your next event one to remember at our unique central London venue, steeped in 200 years of science history.

Find out more

Support us

Support us in our charitable mission to create opportunities for the public and scientists to explore science together.

Donate online Join the Ri

More ways to support

The Royal Institution, 21 Albemarle Street, London W1S 4BS

Find us Museum Licensing Shop

The Royal Institution of Great Britain was granted a royal charter in 1800 and is registered as a charity in England and Wales (227938).

© Royal Institution 2025
  • Terms and conditions
  • Web accessibility
  • Policies
  • Safeguarding

The CHRISTMAS LECTURES® are a registered trademark