Final answer:
The exposure maintenance formula provides proportional correction for a change in brightness and maintains the same signal to the infrared (IR) receiver.
Step-by-step explanation:
The exposure maintenance formula provides proportional correction for a change in brightness and maintains the same signal to the infrared (IR) receiver.
Formula: % correction = (new exposure value / initial exposure value) x 100%.
Example: If the initial exposure value is 200 and the new exposure value is 150, then the % correction would be (150/200) x 100% = 75%.