Question

light emitted by a firefly is considered to be visible light.

Explanation:

Step1: Recall visible light range

Visible light has wavelengths from about 400 - 700 nm.

Step2: Analyze firefly light

Firefly light is seen by human eyes. Since human - visible light is in the visible light spectrum (400 - 700 nm), and firefly light is visible to us, it is in the visible light range.

Answer:

T. True