<caption><image_32>The image is a black and white photograph of a person's hand holding a pressure gauge. The gauge is circular in shape and appears to be mounted on a metal surface. The dial of the gauge is white with black numbers and markings, and there is a needle indicating the pressure level. The needle is pointing towards the right side of the dial, which is marked with a red line. The background of the image is dark, making the gauge stand out.</caption><caption><image_33>The image is a black and white still from a television show. It shows a man in a suit and tie standing in front of a desk with various items on it. The man appears to be in his late 40s or early 50s, with short hair and a serious expression on his face. On the desk, there is a television, a radio, and a small white object. The background is plain and the overall mood of the image is serious and professional.</caption><caption><image_34>The image is a black and white photograph of a person's hand pressing a button on a machine. The machine appears to be a control panel with various buttons and dials. The person's fingers are pressing the button on the panel, which is likely used to control the machine's functions. The panel is rectangular in shape and has a handle on the top for easy operation. The background is blurred, but it seems to be an indoor setting with other machines and equipment visible.</caption><video><caption><image_35>The image is a black and white still from a television show. It shows a man in a suit and tie working on a computer. He is leaning over the control panel and appears to be focused on the task at hand. The man is holding a small white object in his hand and is using it to adjust the settings on the computer. The background is blurred, but it seems like the man is in a room with a desk and other equipment. The image is likely from the early 20th century.</caption><caption><image_36>The image is a black and white still from a television show. It shows two men in a room, one of them is standing and the other is sitting. The man standing is wearing a suit and tie and appears to be in his late twenties or early thirties. He has short, dark hair and is looking down at the ground with a serious expression on his face.

In front of him, there is a large, rectangular device with a handle on top. The device appears to have a control panel with various buttons and knobs. The background is blurred, but it seems to be a room with a desk and other equipment. The overall mood of the image is serious and focused.</caption><caption><image_37>The image is a black and white photograph of a person's hand holding a large circular object. The object appears to be a record player or a turntable, with a control panel on the right side of the image. The control panel has several knobs and buttons, and there is a label on the top right corner that reads "Record Player". In the center of the object, there are several lines that appear to be radiating outwards from the center, creating a waveform-like pattern. The lines are white and are slightly blurred, giving the image a sense of depth and dimension.</caption><caption><image_38>The image is a black and white photograph of a person's hands pressing a button on a record player. The record player is a turntable with a large circular dial in the center. The dial has a line graph on it, which appears to be a sound waveform. The person's hand is pressing the button on the record player, and their fingers are visible on the left side of the image. The background is blurred, but it seems like the person is in a recording studio or recording studio. The image is likely from the early 20th century.</caption></video><caption><image_39>The image is a black and white still from a television show. It shows a man in a suit and tie standing behind a podium. He appears to be in a room with a gray wall and a window in the background. The man is looking down at the podium with a serious expression on his face. The podium is made of metal and has a handle on top. The image is taken from a low angle, looking up at the man.</caption><video><caption><image_40>The image is a black and white photograph of a circular object with a thin line in the center. The line appears to be a sound waveform, with multiple points of light radiating outwards from the center of the image. The lines are arranged in a diagonal pattern, creating a sense of depth and dimension. The background is completely black, making the line stand out even more. The image is taken from a top-down perspective, looking down on the object.</caption><caption><image_41>The image is a black and white still from a television show. It shows a man sitting at a desk with a computer in front of him. He is wearing a suit and tie and appears to be focused on the computer screen. The man is holding a pen in his right hand and is looking down at the screen with a serious expression on his face. The background is a plain wall with a window on the left side. The overall mood of the image is serious and focused.</caption></video> to this Peter and then when I run the double flip back and forth the reading goes up here's a maximum that's going back down is almost to zero and there's and let me leave it on a maximum now if we're to see the effect of photons we have to use dim light as before and the first thing I must do is to cover this apparatus to keep out stray light I'll beam the light source and I must use more and more sensitive ranges of this meter but now the current coming out of the photomultiplier is about ten to the minus ninth and harris let's remember that number we can put the output of the photomultiplier on the cathode ray oscilloscope and you see we have the same kind of pulses that we had in the last film besides looking at them we can listen to them I can use this amplifier if I turn the light off all you hear is an occasional background tick now let me
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