Physics II final Exam #1 Flashcards
What causes chromatic aberration of a converging lens?
different index of refraction for different wavelengths
For relaxed viewing with a microscope, the eyepiece is adjusted to place the final image at
infinity
What is refraction?
the change in direction of light from one medium into another
What causes a change in direction of a light ray?
scattering, reflection, refraction
When does TIR occur?
when light goes from high index of refraction to lower index of refraction
A virtual image occurs when?
light rays appear to come from a point they didn’t pass through
Which types of mirrors always produce upright images?
diverging and plane
Which type of mirror can produce a real image?
converging
When lens is used in a pinhole camera?
no lens
What type of image does a camera record?
real images only
When is the lens of the eye most curved?
when looking at near objects
What part of the eye causes the most refraction?
the cornea
What does the objective lens of a microscope do?
focuses diverging rays into a real image
What is the spreading of different wavelengths of light due to slightly different indices of refraction?
dispersion
How do raindrops produce a single rainbow?
2 refractions and 1 TIR
How can you correct chromatic aberration?
combine a converging and diverging lens
When a wave passes through a small opening it spreads to fill the space beyond the opening. This is known as
diffraction
In order for a color to be visible in thin film interference, the wavelength of that color must
satisfy the constructive interference conditions
In a diffraction grating, the number of slits increases but distance between them remains the same. How does the interference pattern change?
bright fringes get narrower and brighter
What causes the colors of a soap bubble or oil slick?
Thin-film interference
What kind of lens can correct farsightedness?
converging lenses
