Topic content:
The following objects belong to the light source
A. The screen seen during the movie
B. TV picture seen during TV playing
C. Moon
D. Cat's eyes
Best answer:
B
Answer analysis:
There is no explanation for this question
Test core:
Light source: The concept of self luminous substances is called light source classification. Natural light sources such as the sun, fireflies, jellyfish, and other artificial light sources such as torches, oil lamps, candles, and electric lamps are classified according to the light emission principle. Thermal light sources such as the sun, torches, oil lamps, and electric lamps are divided according to the light beam shape. Cold light sources such as fireflies, jellyfish, and other light sources such as electric lamps Note: The light source refers to the object that can emit light by itself, not including the reflected light. For example, the moon reflects the light of the sun, the tail lights of bicycles, the traffic signs of highway L and the screen when the film is playing are reflected to attract the attention of passers-by or audience. They cannot emit light themselves, so they are not light sources