CLT Photobiology & Light Science

Question 1

What is the term for the study of the effects of light on living organisms?

Accepted Answer

Photobiology

Answer

Photometry

Answer

Radiometry

Answer

Spectroscopy

Question 2

Which part of the electromagnetic spectrum is used in most light therapy applications?

Accepted Answer

Visible and near-infrared light

Answer

X-rays and gamma rays

Answer

Microwaves and radio waves

Answer

Far-ultraviolet radiation

Question 3

What is the Grotthuss-Draper Law in the context of light therapy?

Accepted Answer

Only absorbed light can produce photochemical effects

Answer

Light travels in straight lines through tissue

Answer

Longer wavelengths penetrate deeper than shorter wavelengths

Answer

Photons must exceed a threshold intensity to be effective

Question 4

Which cellular organelle is considered the primary chromophore for red and near-infrared light therapy?

Accepted Answer

Cytochrome c oxidase in mitochondria

Answer

Nucleus

Answer

Golgi apparatus

Answer

Lysosome

Question 5

What does the term 'fluence' refer to in light therapy dosimetry?

Accepted Answer

Total energy delivered per unit area (J/cm²)

Answer

Number of photons emitted per second

Answer

The wavelength range of the light source

Answer

The angle of light incidence on tissue

Question 6

Which principle describes the biphasic dose-response relationship in photobiomodulation?

Accepted Answer

Arndt-Schulz Law

Answer

Beer-Lambert Law

Answer

Bunsen-Roscoe Law

Answer

Fick's Law