What controls how much light gets into the camera?

• A. Aperture
• B. Aperture and Shutter Speed
• C. Shutter Speed
• D. Space Light Passes Through

Answer: (B)

Exposure is controlled by how much light reaches the sensor, and two main controls manage that: aperture and shutter speed. The aperture is the opening in the lens; a larger opening lets in more light, while a smaller opening reduces light. Shutter speed determines how long the sensor is exposed to light; a longer duration lets in more light, a shorter duration lets in less. Together, adjusting both settings defines the total amount of light that hits the sensor, which is why both are needed to control exposure. The other options either describe only one of these factors or use a non-technical phrase, so they don’t fully capture how light and exposure are governed.