Science General
Photography and Graphics
3,001 Questions
Photography and graphics questions explore computer graphics, color grading, lighting, and cinematography techniques. These topics are often tested in technical competitive exams and multimedia recruitment tests. Use these explanations to understand the practical applications of visual design and digital editing tools.
Computer graphics techniquesPhotography lighting and colorFilm editing effectsShading and texturingCamera and lens functionsCommercial makeup and visuals
Photography and Graphics Questions
What is the function of the shutter in a camera?
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To control the amount of light entering the lens
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To focus the image on the sensor
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To change the focal length of the lens
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To open and close to expose the sensor to light
D
Correct answer
Explanation
The shutter is a mechanical device that opens and closes to expose the sensor to light. The duration of the exposure is determined by the shutter speed.
What is the purpose of the ISO setting in a camera?
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To control the amount of light entering the lens
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To focus the image on the sensor
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To change the focal length of the lens
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To adjust the sensitivity of the sensor to light
D
Correct answer
Explanation
The ISO setting determines the sensitivity of the sensor to light. A higher ISO setting makes the sensor more sensitive to light, allowing you to take pictures in low-light conditions without using a flash.
What is the purpose of the white balance setting in a camera?
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To adjust the color temperature of the image
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To focus the image on the sensor
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To change the focal length of the lens
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To adjust the brightness of the image
A
Correct answer
Explanation
The white balance setting adjusts the color temperature of the image, which is the overall warmth or coolness of the colors. This is important because different light sources have different color temperatures, and if the white balance is not set correctly, the colors in the image may appear inaccurate.
What is the purpose of the depth of field preview button in a camera?
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To allow the photographer to preview the depth of field before taking the picture
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To focus the image on the sensor
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To change the focal length of the lens
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To adjust the white balance of the image
A
Correct answer
Explanation
The depth of field preview button allows the photographer to preview the depth of field before taking the picture. This is useful for determining how much of the scene will be in focus.
What is the purpose of the self-timer in a camera?
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To allow the photographer to take a picture without having to press the shutter button
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To focus the image on the sensor
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To change the focal length of the lens
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To adjust the white balance of the image
A
Correct answer
Explanation
The self-timer allows the photographer to take a picture without having to press the shutter button. This is useful for taking pictures of oneself or for group shots.
What is the function of the flash mode dial on a camera?
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To change the flash mode of the camera
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To focus the image on the sensor
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To change the focal length of the lens
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To adjust the white balance of the image
A
Correct answer
Explanation
The flash mode dial allows the photographer to change the flash mode of the camera, such as from auto to manual.
What is the purpose of the drive mode dial on a camera?
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To change the drive mode of the camera
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To focus the image on the sensor
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To change the focal length of the lens
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To adjust the white balance of the image
A
Correct answer
Explanation
The drive mode dial allows the photographer to change the drive mode of the camera, such as from single shot to continuous shooting.
What is the function of the metering mode button on a camera?
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To change the metering mode of the camera
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To focus the image on the sensor
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To change the focal length of the lens
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To adjust the white balance of the image
A
Correct answer
Explanation
The metering mode button allows the photographer to change the metering mode of the camera, such as from spot metering to center-weighted metering.
What is the purpose of the image quality setting on a camera?
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To change the image quality of the camera
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To focus the image on the sensor
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To change the focal length of the lens
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To adjust the white balance of the image
A
Correct answer
Explanation
The image quality setting allows the photographer to change the image quality of the camera, such as from JPEG to RAW.
What is the purpose of bias subtraction in CCD imaging?
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To remove the noise caused by cosmic rays
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To correct for the non-uniformity of the CCD pixels
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To remove the bias level from the image
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To compensate for the dark current generated in the CCD
C
Correct answer
Explanation
Bias subtraction in CCD imaging is used to remove the bias level from the image, which is the offset voltage that is present in the CCD even in the absence of light.
What is the purpose of cosmic ray rejection in CCD imaging?
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To remove the noise caused by cosmic rays
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To correct for the non-uniformity of the CCD pixels
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To remove the bias level from the image
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To compensate for the dark current generated in the CCD
A
Correct answer
Explanation
Cosmic ray rejection in CCD imaging is used to remove the noise caused by cosmic rays, which are high-energy particles that can strike the CCD and cause bright spots in the image.
What is the purpose of dithering in CCD imaging?
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To increase the resolution of the image
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To reduce the noise in the image
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To improve the dynamic range of the image
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To compensate for the effects of atmospheric turbulence
B
Correct answer
Explanation
Dithering in CCD imaging is used to reduce the noise in the image by taking multiple images of the same object with slightly different pointing positions and then combining them together.
What is the purpose of stacking in CCD imaging?
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To increase the resolution of the image
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To reduce the noise in the image
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To improve the dynamic range of the image
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To compensate for the effects of atmospheric turbulence
Correct answer
Explanation
Stacking in CCD imaging is used to increase the signal-to-noise ratio of the image by combining multiple images of the same object together.
What is the purpose of photometry in CCD imaging?
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To measure the brightness of objects in an image
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To measure the color of objects in an image
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To measure the size of objects in an image
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To measure the distance to objects in an image
A
Correct answer
Explanation
Photometry in CCD imaging is used to measure the brightness of objects in an image by measuring the amount of light that they emit or reflect.
What is the purpose of spectroscopy in CCD imaging?
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To measure the brightness of objects in an image
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To measure the color of objects in an image
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To measure the size of objects in an image
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To measure the distance to objects in an image
Correct answer
Explanation
Spectroscopy in CCD imaging is used to measure the wavelength of light emitted or absorbed by objects by dispersing the light into a spectrum.