Question

Shutter speed is one of the parameters by which exposure of the image can be controlled. How does shutter speed control exposure?

• A. By increasing the size of the opening through which light enters the camera.
• B. By increasing sensitivity of the image sensor.
• C. By increasing the time for light to enter the camera.
• D. By increasing the number of pixels in the image.

Answer 1

The Correct Option is C

Shutter speed plays a crucial role in controlling the exposure of an image by determining the duration for which the camera's sensor is exposed to light. It is the length of time the camera shutter is open to let light in. Different settings of shutter speed can significantly affect the brightness of an image:

• Fast Shutter Speed: A short opening time (e.g., 1/1000 of a second) reduces exposure, admitting less light—ideal for capturing fast movement and preventing motion blur.
• Slow Shutter Speed: A long opening time (e.g., 1/2 of a second) increases exposure, admitting more light—useful in low-light conditions or to create motion blur intentionally.

The correct explanation for how shutter speed affects exposure is through "increasing the time for light to enter the camera." The longer the shutter is open, the more light hits the sensor, affecting the image's brightness and clarity.