An iridescent hibiscus flower under a microscope - Dr Marty Jopson скачать в хорошем качестве

An iridescent hibiscus flower under a microscope - Dr Marty Jopson

What does a flower look like under a microscope? Using a high-powered scanning electron microscope, Dr Marty Jopson scrutinizes a hibiscus flower, zooming in on its petals to understand what gives flowers their colour and how some areas of flowers appear iridescent. 0:00 Introduction 0:26 What is a scanning electron microscope (SEM)? 3:02 Hibiscus flower iridescence 4:16 Imaging the 'normal' white petal 6:27 Imaging the iridescent purple petal 7:38 Nature's diffraction grating 9:57 Why have flowers evolved iridescence? Speaker profile: Self-professed 'science geek', Dr Marty Jopson originally hailed from South London. He studied Natural Sciences (Botany) at Cambridge University before completing a PhD in plant cell biology at the John Innes Institute in Norwich. He's been making science television for over twenty years and has worked behind the camera as a researcher, prop builder, director, producer, executive and company manager. As well as presenting science on the BBC One Show, he's also appeared on regional, national and international series like Invention Nation (BBC1) and Brainiac (Sky1). When not on television, he performs science shows at festivals around the country including the Royal Institution, Cheltenham Science Festival, Edinburgh International Science Festival and BIG Bang Fair. This video is the second of two created for the 2020 Gatsby Plant Science Summer School using the the powerful, ultra-high resolution (nanometre scale) Zeiss Gemini Scanning Electron Microscope (SEM).