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COT Exam UPDATED Exam Questions and CORRECT Answers

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COT Exam UPDATED Exam Questions and CORRECT Answers The range of wavelengths in the visible spectrum is? - CORRECT ANSWER- 400 - 800 nanometers Immediately on either side of the visible spectrum are the invisible light segments of? - CORRECT ANSWER- Infrared & ultraviolet Which color has th...

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  • September 14, 2024
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COT Exam UPDATED Exam Questions
and CORRECT Answers
The range of wavelengths in the visible spectrum is? - CORRECT ANSWER✔✔- 400 - 800
nanometers


Immediately on either side of the visible spectrum are the invisible light segments of? -
CORRECT ANSWER✔✔- Infrared & ultraviolet



Which color has the longest wavelength? - CORRECT ANSWER✔✔- Red



Geometric optics includes? - CORRECT ANSWER✔✔- The effects of media on the path of
light


When light bounces back from an object, this is known as? - CORRECT ANSWER✔✔-
Reflection


In reflection, the light rays that hit the object or interface between media with different
indices of refraction are called? - CORRECT ANSWER✔✔- Incident rays



In optics, a medium (or media, plural) is: - CORRECT ANSWER✔✔- An object that reflects
light


When light passes through a transparent medium, it may travel straight through
(transmission) or its path may be altered. This altering or bending property of a medium is
known as? - CORRECT ANSWER✔✔- Refraction



The ray of light that enters a transparent medium is termed? - CORRECT ANSWER✔✔-
Incident ray


If light passes through a lens and the rays are spread apart on exiting, this is known as? -
CORRECT ANSWER✔✔- Divergence

,If light passes through a lens and the rays are spread toward each other on exiting, this is
known as? - CORRECT ANSWER✔✔- Convergence


A comparison of the speed of light in air to the speed of light through substance is? -
CORRECT ANSWER✔✔- IR (Snell's Law)


The denser the substance, the more slowly light passes through it and the what? - CORRECT
ANSWER✔✔- The higher the IR



The IR of crown glass is? - CORRECT ANSWER✔✔- 1.50


Light traveling through a prism will be bent toward the prisms what? - CORRECT
ANSWER✔✔- Base



The image of an object viewed through a prism Is what? - CORRECT ANSWER✔✔- Virtual
and shifted toward the apex


A 1.00 diopter prism bends light? - CORRECT ANSWER✔✔- 1 cm at a distance of 1m
from the prism


A 2.00 diopter prism displaces an object 1cm at a distance of what? - CORRECT
ANSWER✔✔- 05 m


The displacement of an object 5cm at a distance of 1m would require prism of what? -
CORRECT ANSWER✔✔- 5.0 diopters


At a distance of 2m, a 12 diopter prism would displace an object how far? - CORRECT
ANSWER✔✔- 24cm



A spherical lens refracts light? - CORRECT ANSWER✔✔- Equally in every direction



A 1.00 diopter spherical lens focuses light at? - CORRECT ANSWER✔✔- 1meter

,The point at which a lens forms an image (whether real or virtual is the what? - CORRECT
ANSWER✔✔- focal point


True of false, regarding the optical center of a lens it always coincides with the geometric
center of the lens? - CORRECT ANSWER✔✔- False



The focal length of a lens is what? - CORRECT ANSWER✔✔- The distance between the
lens and the focal point


Because the focal point of a minus lens is virtual, the focal length of a minus lens is what? -
CORRECT ANSWER✔✔- Likewise virtual



What is the formula for finding the focal length? - CORRECT ANSWER✔✔- P = 1/F



What is the focal length of a 5 diopter lens? - CORRECT ANSWER✔✔- 0.2 m



A lens has a focal length of 33cm what is its dioptic power? - CORRECT ANSWER✔✔- 3
diopters


Name 3 characteristics of a cylindrical lens? - CORRECT ANSWER✔✔- 1. They are used
to correct astigmatism
2. They have power in one axis, but no power in the axis 90 degrees away
3. They focus light in a line


The direction of the line of light as focused by a plus power cylindrical lens is what? -
CORRECT ANSWER✔✔- Aligned with the axis


Light passing through a cylindrical lens is focused in 2 lines perpendicular to each other &
separated by an area known as what? - CORRECT ANSWER✔✔- Sturm's interval

, The light rays in the Sturm's interval are projected in the shape of a what? - CORRECT
ANSWER✔✔- cone


Within the Conoid of Sturm the area where the image would be most clearly focused is? -
CORRECT ANSWER✔✔- The circle of lease confusion



An optical cross is a means of what? - CORRECT ANSWER✔✔- Indicating the dioptic
power of a lens


The ocular media consists of? - CORRECT ANSWER✔✔- The tear film, cornea, humors &
lens


Which ocular structure has the highest refractive power? - CORRECT ANSWER✔✔-
Cornea


The primary goal of the eye's components is to what? - CORRECT ANSWER✔✔- Focus
incoming light onto the retina


Images pass through the optic nerve & thence to the what? - CORRECT ANSWER✔✔-
Chiasm, optic tract, lateral geniculate body, & optical cortex


All of the following are true regarding the accommodative reflex except: It is stimulated by a
blurred image, It is not a true reflex, It is required for viewing distant objects or it includes
convergence, miois & focusing - CORRECT ANSWER✔✔- It is required for viewing
distant objects


When the ciliary muscle relaxes what happens? - CORRECT ANSWER✔✔- The lens is
pulled thinner


The main reason one's accommodation ability decreases with age is due to what? -
CORRECT ANSWER✔✔- Hardening of the crystalline lens


With accommodation fully relaxed what is the pt's point of clearest vision? - CORRECT
ANSWER✔✔- the far point

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