Biophysics - Senses Test

20 Questions | Total Attempts: 116

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Biophysics Quizzes & Trivia

Microtest/labtest


Questions and Answers
  • 1. 
    If intensity of sound is increased 100times (100 people are talking all at once), then the intensity level of sound increases by
    • A. 

      10 dB.

    • B. 

      33 dB

    • C. 

      66 dB

    • D. 

      20 dB

  • 2. 
    Central visual field:
    • A. 

      Corresponds to the angle of 0? - 25? with the optical axis of an eye

    • B. 

      Corresponds to the angle of 0? - 35? with the optical axis of an eye

    • C. 

      Corresponds to the angle of 0? - 40? with the optical axis of an eye

    • D. 

      Corresponds to the angle of 0? - 30? with the optical axis of an eye

  • 3. 
    Visual sensitivity is defined as
    • A. 

      Sensitivity (dB) = 10 x log (maximum intensity / set intensity

    • B. 

      Sensitivity (dB) = 10 x ln (maximum intensity / set intensity

    • C. 

      Sensitivity (dB) = 20 x log (maximum intensity / set intensity

    • D. 

      Sensitivity (dB) = 20 x ln (maximum intensity / set intensity)

  • 4. 
    Relative audiogram:
    • A. 

      Expresses values of hearing improvement in decibels in comparison with the values of normal threshold of hearing

    • B. 

      Expresses hearing loss in decibels in comparison with the values of normal threshold of hearing

    • C. 

      Expresses hearing loss in watts per square meter in comparison with the values of normal threshold of hearing

    • D. 

      Expresses hearing improvement in decibels in comparison with the values of normal threshold of hearing (0,5 kHz, 1 kHz, 2 kHz, 4 kHz, 8 kHz

  • 5. 
    Perimetry is a method
    • A. 

      For measuring distance between pupils of eyes

    • B. 

      For examining visual field of eyes

    • C. 

      For calculation of parameters of patient’s spectacles

    • D. 

      For examination of accomodation abbility of lens

  • 6. 
    Watt per square meter is the unit for
    • A. 

      Intensity of sound

    • B. 

      Intensity level of sound

    • C. 

      Loudness

    • D. 

      Loudness level

    • E. 

      No answer is correct

  • 7. 
    Minimal angle of resolution (MAR) and visual acuity (V) are approx. in the relation:
    • A. 

      V = 1/MAR

    • B. 

      V = log MAR

    • C. 

      Log V = - log MAR

    • D. 

      MAR = log V

  • 8. 
    Audiometer is an electroacoustic device which is constructed for:
    • A. 

      Measuring an organ of hearing

    • B. 

      Examination of function of organ of hearing

    • C. 

      Pre-surgery measurement of an organ of hearing

    • D. 

      Examination of middle ear functioning

  • 9. 
    The most frequent audiometric examination is determination of thresholds of hearing for pure tones, which is conducted:
    • A. 

      By air conduction as well as by conduction through middle ear.

    • B. 

      By spatial conduction as well as by bone conduction

    • C. 

      By air conduction as well as by body conduction

    • D. 

      By air conduction as well as by bone conduction

  • 10. 
    Normal hearing threshold for specific frequencies looks on a relative audiogram like
    • A. 

      Vertical line

    • B. 

      Horizontal line

    • C. 

      Slanted at the angle of 45?

  • 11. 
    For examining visual acuity e. g. Snellen’s optotypes are used, to more objective methods belongs:
    • A. 

      Lagrange rings

    • B. 

      Larousse rings

    • C. 

      Legendre rings

    • D. 

      Landolt rings

  • 12. 
    Which of the series give frequencies that are one octave apart?
    • A. 

      125 Hz, 250Hz, 500 Hz, 1000 Hz

    • B. 

      100 Hz, 300 Hz, 900 Hz, 2700 Hz

    • C. 

      50 Hz, 200 Hz, 800 Hz, 3200 Hz

  • 13. 
    The unit for intensity level of a sound is
    • A. 

      Son

    • B. 

      Decibel

    • C. 

      Watt per square meter

    • D. 

      No answer is correct

  • 14. 
    The threshold audiogram has
    • A. 

      Frequencies on the horizontal line

    • B. 

      Intensity levels on the horizontal line

    • C. 

      The horizontal line corresponds to the left ear

  • 15. 
    The minimum separabile is used c also correct
    • A. 

      For description of minimum distance of eyes

    • B. 

      For determination of stereoscopic parallax

    • C. 

      For description of angle resolution of eye

    • D. 

      For design of glasses

  • 16. 
    Minimal angle of resolution (MAR) and visual acuity (V) are approx. in the relation:
    • A. 

      V = 1/MAR

    • B. 

      V = log MAR

    • C. 

      Log V = - log MAR

    • D. 

      MAR = log V

  • 17. 
    Velocity of the sound in air is 340 m/s. The vawelength of the harmonic tone of frequecy 1 kHz in air is
    • A. 

      10 mm

    • B. 

      34 mm

    • C. 

      340 nm

    • D. 

      1 mm

    • E. 

      No answer is correct

  • 18. 
    Lens refraction capability is expressed by the physical quantity:
    • A. 

      Called focal length

    • B. 

      Called optical power

    • C. 

      Called refractive index

    • D. 

      Called optical radius

  • 19. 
    Punctum Remotum is
    • A. 

      A point from which the eye can see sharply without accomodation

    • B. 

      In finite distance for a normal eye

    • C. 

      In infinite distance for a normal eye

    • D. 

      A point from which an eye can see sharply at maximum accomodation

  • 20. 
    Minimum separabile
    • A. 

      Is basis of evaluation of color perception

    • B. 

      Is basic resolution of colours

    • C. 

      Equals 1 by human eye

    • D. 

      Equals 5 by human eye

    • E. 

      Is eye resolution limit

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