Unique Lecture

Although today's lecture was meant to be a radiology lecture, the doctor managed to cover much more than just radiology: faith, history, art, psychology, philosophy, physics and ophthalmology.

The physics behind X-rays. Their difference from visible light. X-rays have shorter wavelength and higher frequency as compared to visible light. This gives them more energy, and hence more ability to penetrate through our body. He used the example of trying to hit someone with a ball and bullet.

Faith came into play, when he told us about how you dont really see the lungs on the film, but you know its there when you see a shadow (the proof), just like you dont see God but you believe in him.

History of X-rays, obviously. About Roentgen, and his discovery with the tubes. And how they came to be called Roentgen rays.

Art, when he spoke of picasso and his art. About how its all about using your imagination. He drew a chair on the whiteboard, and said we look at it and we see a 3-D image, whereas it is only a 2-D image. All the work of the mind. Just like that, you have to work your head when you look at the X-ray, to tell what part is anterior and which is posterior.

I dont even remember why he spoke of Ophthalmology though. It had nothing to with the lecture. I remember him mentioning the normal respone to dark rooms. How the pupils dilate and then the cones give up their duty and is taken over by the rods. Because the rods are more sensitive than the cones.

And it went on and on and on... (I dont remember the rest)