SEMMELWEIS UNIVERSITY Medical
Biophysics I. Semifinal - Practice topics
Exam 2026 Questions and Answers
How does refractive power of a lens change if its radius of curvature decreases? -
Correct Answer-The power increases
How does refractive power of a lens change if its radius of curvature increases? -
Correct Answer-The power decreases
What is radius of curvature in case of a lens? - Correct Answer-Flattener lens=
larger radius of curvature. More rounded
lens=lesser radius of curvature.
How does refractive power of a lens change if its index of refraction increases? -
Correct Answer-Refractive power will increase
Calculate the refractive power of a lens with a focal distance of 25 cm. - Correct
Answer-1/0.25=4 dpt
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, Calculate the refractive power of a lens with a focal distance of 20 cm. - Correct
Answer-1/0.20=5 dpt
Calculate the refractive power of a lens with a focal distance of 17 mm. - Correct
Answer-1/0.017=5.88 dpt
Characterize the image of an object placed within the focal distance of a
converging lens. - Correct Answer-Virtual, magnified and upright
Characterize the image of an object placed between the single and the double focal
distance of a converging lens. - Correct Answer-Real, magnified and inverted
Characterize the image of an object placed outside the double focal distance of a
converging lens. - Correct Answer-Real, diminished and inverted
What kind of image is formed by a compound light microscope? - Correct Answer-
Virtual, magnified and inverted
What is the total magnification of a light microscope if the objective magnification
is 100x and the ocular magnification is 20x? - Correct Answer-100*20= 2000
Describe the steps of the eyepiece scale calibration process. - Correct Answer-
1.eyepiece scale is placed in the intermediate image plane (unknown units)2.place
a stage micrometer (with known units) as a ''specimen'' 3.focus the eyepiece scale
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Biophysics I. Semifinal - Practice topics
Exam 2026 Questions and Answers
How does refractive power of a lens change if its radius of curvature decreases? -
Correct Answer-The power increases
How does refractive power of a lens change if its radius of curvature increases? -
Correct Answer-The power decreases
What is radius of curvature in case of a lens? - Correct Answer-Flattener lens=
larger radius of curvature. More rounded
lens=lesser radius of curvature.
How does refractive power of a lens change if its index of refraction increases? -
Correct Answer-Refractive power will increase
Calculate the refractive power of a lens with a focal distance of 25 cm. - Correct
Answer-1/0.25=4 dpt
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, Calculate the refractive power of a lens with a focal distance of 20 cm. - Correct
Answer-1/0.20=5 dpt
Calculate the refractive power of a lens with a focal distance of 17 mm. - Correct
Answer-1/0.017=5.88 dpt
Characterize the image of an object placed within the focal distance of a
converging lens. - Correct Answer-Virtual, magnified and upright
Characterize the image of an object placed between the single and the double focal
distance of a converging lens. - Correct Answer-Real, magnified and inverted
Characterize the image of an object placed outside the double focal distance of a
converging lens. - Correct Answer-Real, diminished and inverted
What kind of image is formed by a compound light microscope? - Correct Answer-
Virtual, magnified and inverted
What is the total magnification of a light microscope if the objective magnification
is 100x and the ocular magnification is 20x? - Correct Answer-100*20= 2000
Describe the steps of the eyepiece scale calibration process. - Correct Answer-
1.eyepiece scale is placed in the intermediate image plane (unknown units)2.place
a stage micrometer (with known units) as a ''specimen'' 3.focus the eyepiece scale
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
