Physics End Of Term Exam Flashcards
What is light in terms of its nature?
Light is a transverse wave that does not need to travel through particles.
Light relies on the magnetic field and can travel through a vacuum.
What are the three primary colors of light?
- Red
- Green
- Blue
What happens when you look at an object?
The object reflects light of its color into your eye.
What color does an apple reflect?
Red light.
What color does a magenta screen reflect?
Red and blue light.
What is the result of mixing red and blue light?
Magenta.
What is the result of mixing blue and green light?
Cyan.
What is the result of mixing red and green light?
Yellow.
What is the result of mixing red, green, and blue light?
White.
What will appear when looking through a red screen at a green ball?
The light will appear black.
Why does the light appear black when looking through a red screen at a green ball?
The screen blocks all colors but red, and the ball blocks all colors but green.
What is the definition of time period in wave terms?
Time it takes for one full wave to occur.
What is the definition of wavelength?
Distance between any two peaks of a wave.
What does frequency measure in wave terms?
Waves per second.
What is the trough of a wave?
The lowest point of the wave.
What is the rest position in wave terms?
The position from which the wave oscillates.
Fill in the blank: Light is a _______ wave.
transverse
True or False: Light can travel through a vacuum.
True.
