midterm 1 ish
total internal reflection can only be achieved when light passes between two media with indices of refraction that are (higher to lower/lower to higher) in value
higher to lower
when a prism bends light, the final ray emerging is (deviated/not deviated) from the original ray and the vergence is (changed/not changed)
deviated; not changed
A person looking through a microscope focuses first at the top of the surface of a fluid filled dish, then moves down to focus on the insect at the bottom of the dish: this will give the (apparent shift / apparent depth / lift / object distance / image distance)
apparent depth
since light rays travel in a positive direction from left to right, a lens with a negative radius of curvature will have the center of curvature on the ___ side of the lens
left
where are the nodal points in air?
N is at P and N' is at P'
if you have an expanded depth of focus, the (image/object) location can remain in focus over a greater distance
image
as the apical angle of an ophthalmic prism increases in value, the total amount of image displacement will (increase/decrease) towards the prism apex
increase
pinhole optical systems have all these properties EXCEPT:
a. image is inverted
b. image is in focus no matter where the image screen is moved
c. image brightness is proportional to distance to screen
d. image brightness is inversely proportional to distance to screen
e. image is in focus no matter where the object is
c. image brightness is proportional to distance to screen
steeper
Which one is not true about hemi-sphere magnifier with a 2.54 cm center thickness?
a. The image is virtual, upright, magnified, and at the same location as the object
b. the object is outside the first focal length
c. the radius is -2.54 cm
d. the object location is at -2.54 cm
B. the object is outside the first focal length
on a diverging wavefront, the amount of vergence measured downstream from an arbitrary point will be more or less negative?
less negative
rays taht are incident on an optical system are associated with the ___ location
object
when viewing the objevt after being refracted by the plane surface, the viewer is seeing a ____ ____ object and an ___ image
optically real object; virtual image
in concave meniscus, the front surface of the lens is a (concave/convex) surface which bulges outward from the higher index material, while the back surface is a (concave/convex) surface which bulges inward toward the higher index material
convex; concave
the front vertex power is a combination of wat
front surface power + the effective power of the back surface
as the index increases, the vergence (L) in diopters will
increase
for optical systems in optics 1, light is considered to travel from
left to right
when the object is being imaged from a higher index to a lower index, the rays will (converge/diverge) and the image will seem (further/closer) than the object
diverge; closer
a patient w/ minus powered spectaccles views off center above the optical axis of both lenses. the patient has induced a base ___ prismatic effect
up
what the lensometer equation
x = fref2 Dunk
if your patient describes a floater as being dark and defined, the object is ___ from the retina than if they described the floater as a fuzzy shadow
if an object is real and inside f, what is the type of lens, type of image, orientation, and magnification of the image
converging, virtual, upright, and magnified
right
horizontal; vertical
Increasing the thickness of a biconvex lens will cause the principal planes to (increase / decrease / stay the same) in distance until beyond the thickness of a sphere.
decrease