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ABO OPTICAL EXAM QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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ABO OPTICAL EXAM QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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ABO OPTICAL EXAM QUESTIONS ANDANSWERS WITH SOLUTIONS 2024
Light falling on the front surface of a spectacle lens is:
A) partially reflected, partially absorbed and the remainder refracted
B) partially reflected and the remainder refracted
C) partially absorbed and the remainder refracted
D) totally refracted - ANSWER A) partially reflected, partially absorbed and the remainder refracted
Concave mirror:
A) can focus parallel incident rays to form a real image
B) can focus parallel incident Rays to form a virtual image
C) always produce inverted images of real objects
D) produces virtual images smaller than the real object. - ANSWER A) can focus parallel incident rays to
form a real image
Reflection is reduced by depositing a layer of magnesium fluoride on the lens surface. It has a thickness
of:
A) 1/2 the wave length of white light
B) 1/4 the wave length of white light
C) 1/2 the wave length of blue-violet light
D) the wave length of yellow light - ANSWER D) the wave length of yellow light
White light is broken into its components colors when it is:
A) diffracted
B) refracted
C) reflected
D) diffracted or refracted - ANSWER D) diffracted or refracted
Anti reflective coating of a lens is based on the principle of:
, A) diffraction
B) reflection
C) interference
D) reflection and interference - ANSWER D) reflection and interference
To the viewer the image seen in a plane mirror appears to be:
A) inverted
B) 1/2 as large as the object
C) twice as large as the object
D) as far behind the mirror as the object is in front of it. - ANSWER D) as far behind the mirror as the object
is in front of it.
The velocity of light is least in:
A) air
B) polycarbonate
C) water
D) flint glass - ANSWER D) flint glass
What is prism in simplest terms? - ANSWER A wedge of transparent material used to disperse and or
deviate light.
Define Phoria - ANSWER A TENDENCY to cross (not cosmetic)
Define Tropia - ANSWER An actual "crossing" very noticeable.
Crown glass index - ANSWER 1.523
Which lens has more aberrations?
A) Flint Glass
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