<transcript><audio_0>we have studied waves in considerable detail and we have found that they seem to describe the behavior of light but in the last film I showed you an experiment in which light seemed to behave like a</transcript><video><caption><image_1>The image is a black and white still from a TV show. It shows a man in a suit and tie standing in front of a gray background. He is looking directly at the camera with a serious expression on his face. The man appears to be in his late twenties or early thirties and has short, dark hair. He has a slight smile on his lips and is wearing a dark suit jacket over a white shirt and a black tie. The overall mood of the image is serious and professional.</caption><caption><image_2>The image is a black and white still from a movie or TV show. It shows a man in a suit and tie, standing in a dimly lit room with a blurred background. He appears to be deep in thought, with his eyes closed and his head tilted downwards. His hair is slicked back and he has a slight smile on his face. The overall mood of the image is somber and contemplative.</caption><caption><image_3>The image is a black and white still from a television show. It shows a man in a suit and tie standing in a room with a gray background. He appears to be deep in thought, with his eyes closed and his mouth slightly open. His hair is slicked back and he has a slight smile on his face. The man is wearing a dark suit with a white shirt and a black tie. The overall mood of the image is somber and contemplative.</caption><caption><image_4>The image is a black and white still from a movie or TV show. It shows a man standing behind a podium and speaking into a microphone. He is wearing a suit and tie and appears to be giving a speech or presentation. The background is a plain white wall with a shadow of a person on the right side of the image. The man is standing in front of the podium and is looking towards the audience. The image is taken from a low angle, so the focus is on the man and the podium.</caption></video><transcript><audio_5>particle we now have two ideas about light waves and particles which is right well in some sense both ideas are right and to show you this I will do an experiment in which the wave properties</transcript><caption><image_6>The image is a black and white still from a television show. It shows a man standing behind a podium with a microphone in front of him. He is wearing a suit and tie and appears to be giving a speech or presentation. The background is plain and there is a whiteboard on the right side of the image. The man is looking directly at the camera with a serious expression on his face.</caption><transcript><audio_7>of light and the particle properties are seen at the same time here's our apparatus it consists with a light source with a slit in front of it the</transcript><caption><image_8>The image is a black and white photograph of a person's hand holding a small device. The device appears to be a small, cylindrical object with a handle on one side and a spout on the other side. The handle is attached to a metal pipe with a clamp on it. The person's fingers are visible on the left side of the image, and they are holding the device with their thumb. The background is dark, and there is a brick wall visible in the background.</caption><transcript><audio_9>light comes along here and go through a hole in this baffle which is designed to keep out stray light and then the light strikes this double slit here which can be moved back and forth by means of this</transcript><video><caption><image_10>The image is a black and white photograph of a person's hand pointing towards a small metal object. The object appears to be a part of a larger machine or equipment. The hand is positioned in a way that it is pointing towards the right side of the image. The background is dark and out of focus, making the object stand out. The image is taken from a low angle, so the focus is on the hand and the object.</caption><caption><image_11>The image is a black and white photograph of a hand pointing towards a small electronic device. The device appears to be a small, rectangular box with a handle on top. The handle is made of metal and has two screws on either side. The body of the device is rectangular in shape and has a small hole in the center. The background is dark and out of focus, making the device the focal point of the image.</caption><caption><image_12>The image is a black and white photograph of a small electronic device. The device appears to be made of metal and has a rectangular base with a rectangular shape. On top of the base, there are two metal brackets with screws and bolts. The brackets are connected to a metal plate with a small hole in the center. The plate is resting on a wooden surface. The background is dark and out of focus, making the device the focal point of the image. The image is taken from a low angle, looking up at the device.</caption><caption><image_13>The image is a black and white photograph of a man sitting at a desk with a laptop in front of him. He is wearing a suit and tie and appears to be focused on the laptop screen. The desk is made of wood and has a black tablecloth on it. The background is a plain grey wall. The man is looking down at the laptop with a serious expression on his face. The image is taken from a low angle, with the focus on the man and the laptop.</caption></video><caption><image_14>The image is a black and white still from a television show. It shows a person's hand pointing towards a whiteboard on a table. The person is wearing a suit and appears to be in the middle of a presentation. On the table, there is a small device with a cylindrical shape and a handle on the right side. The device appears to have a small circuit board attached to it. The background is blurred, but it seems like the person is standing in front of a projector screen. The overall mood of the image is serious and focused.</caption><transcript><audio_15>electric motor and this mechanism and I have this pointer here to keep track of its position when the pointer moves in this direction the split is coming towards me and when I reverse the motor the pointer reverses and the slit moves</transcript> we have studied waves in considerable detail and we have found that they seem to describe the behavior of light but in the last film I showed you an experiment in which light seemed to behave like a particle we now have two ideas about light waves and particles which is right well in some sense both ideas are right and to show you this I will do an experiment in which the wave properties of light and the particle properties are seen at the same time here's our apparatus it consists with a light source with a slit in front of it the light comes along here and go through a hole in this baffle which is designed to keep out stray light and then the light strikes this double slit here which can be moved back and forth by means of this electric motor and this mechanism and I have this pointer here to keep track of its position when the pointer moves in this direction the split is coming towards me and when I reverse the motor the pointer reverses and the slit moves
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