The ciliary muscle is instrumental in changing the shape of which eye part?
a. iris
b. lens
c. pupil
d. retina
[Ques. 2] A converging lens will be prescribed by the eye doctor to correct which of the following?
a. farsightedness
b. glaucoma
c. nearsightedness
d. astigmatism
[Ques. 3] A CCD camera is equipped with a lens with constant focal length. As the f-number is decreased, which of the following quantities remain unchanged?
a. the aperture
b. the depth of field
c. the appropriate exposure time
d. the intensity of light reaching the sensor
e. None of the above quantities remains unchanged.
[Ques. 4] Using a camera with a fixed focal length lens, how will decreasing the f-number affect the depth of field and the intensity of the light reaching the ccd (or film)?
a. The depth of field will increase as will the intensity of light reaching the ccd.
b. The depth of field will increase but the intensity of light reaching the ccd will decrease.
c. The depth of field will decrease as will the intensity of light reaching the ccd.
d. The depth of field will decrease but the intensity of light reaching the ccd will increase.
[Ques. 5] A camera is used to photograph the full moon, which has an angular diameter of 0.53. The image on the film is 2.3 mm in diameter. What is the focal length of the lens?
a. 2.3 mm
b. 500 mm
c. 250 mm
d. 790 mm
e. 25.5 mm
[Ques. 6] A low f-number
a. allows a smaller depth of field.
b. allows using a faster shutter speed.
c. causes less spherical aberration.
d. is not related to any of the above options.
[Ques. 7] A 1.7-m tall woman stands 8.0-m in front of a camera with a 5.0-cm focal length lens. What is the size of the image formed on film?
a. 23.5 cm
b. 2.7 cm
c. 1.1 cm
d. 68.0 cm
e. 0.37 cm
[Ques. 8] Changing the f-number of a camera by three stops by going from f/11 to f/32 will change the intensity of the light hitting the film by a factor of
a. 8.
b. 4.
c. 1/4.
d. 1/8.
e. 32.
[Ques. 9] A camera uses a
a. converging lens to form a real image.
b. converging lens to form an imaginary image.
c. diverging lens to form a real image.
d. diverging lens to form an imaginary image.
[Ques. 10] I take two pictures of my dog Kaycee. I use the same film and level of illumination for both pictures, but I quadruple the f-number for the second picture. By what factor will the required time of exposure change if the film is to receive the same total light energy?
a. 0.06
b. 0.25
c. 4.0
d. 16.0
e. 3.0
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