#2 Physical Science Final Exam Flashcards
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35 Terms
Do Electromagnetic waves need a medium?
No
Shorter wavelength means…
Higher frequency and higher energy
Which visible color has the shortest wavelength?
Violet
Which visible color has the longest wavelength?
Red
What do mechanical waves require to travel?
A medium (solid, liquid, or gas)
In which wave does the medium more perpendicular to the wave direction?
Transverse wave
In which wave does the medium move parallel to the wave direction?
Longitudinal wave
What is refraction?
The bending of light as it changes speed moving between materials
What does a convex lens do to light rays?
Bends them toward a focal point (converges)
Images seen through a concave lens appear…
Smaller
Which mirror curves inward?
Concave mirror
What is the image effect of a convex mirror?
Images appear smaller
What is the Law of reflection?
Angle of incidence equals angle of reflection
Which circuit has only one path for current?
Series circuit
Which circuit has multiple paths for current?
Parallel circuit
Which type of circuit generally has brighter bulbs?
Parallel circuit
What process produces the Sun’s energy?
Nuclear fusion
What happens to the amount of hydrogen in the Sun over time?
It decreases (fuses into helium)
Most stars on the H-R diagram are classified as?
Main sequence
What is the color of the coolest stars?
Red
What is the color of the hottest starts?
Blue
What is the color of the hottest stars?
Blue
Where is our Sun located on the H-R diagram?
Main sequence
Which Electromagnetic waves has the most energy?
Gamma rays
Which Electromagnetic waves has the lowest frequency?
Radio waves
A convex lens acts like two prisms set…
Base to base
A concave lens acts like two prisms set…
Point to point
Adding more bulbs to a series circuit makes the bulbs…
Dimmer
In which circuit will bulbs stay lit if one is removed?
Parallel circuit
What happens to light speed during refraction?
It changes as it moves between materials
What is the approximate temperature of our Sun?
5,000 to 6,000 K
Which star type has high temperature and high luminosity?
Blue giants
Which star type has low temperature and high luminosity?
Red giants and supergiants
What is the color of the stars with the lowest temperature?
Red
What will helium levels do in the Sun’s core over time?
Increase