answer sheet for your answers.
1. How do you call objects that emit light?
A. luminous
B. non-luminous
C. opaque
D. transparer
2. Which of the following items best describes the nature of light?
A. current and wave
C. point and wave
B. mass and particle
D. wave and particle
3. Which of the following is NOT a natural sources of light in our surroundings?
A. fire
B. flashlight
C. jellyfish
D. lightning​