Visuelle Wahrnehmung

1: Which UV light is typically most harmfull for human skin outside, at sea level during the day?

1: How is UV light classified into A, B and C?

1: The energy of light ...

1: The range of the wavelenghts of visible light ranges from --- to --- .

1: The range of wavelengths of ultraviolet (UV) Light ranges from --- to ---.

1: The range of wavelengths of near infrared (IR) light ranges from --- to ---.

1: The human photopic luminosity function V (lambda) is obtained through

1: If you want to measure optic radiation as a vision scientist in terms of perceived brightness you tipically are interested in

1: What are the three main types of light reflection at surfaces

1: Which UV light is most harmfull for human skin if directly (artificially) applied by some device?

1: Irradiance is a measure of radiometrc flux per unit area, or flux density. Thus irradiance ..

1: Black-body radiation is ermitted by a black body (an opaque and non-reflective body) held at constant, uniform temperature.

The radiation has aspecific spectrum and intensity that depends only on the temperature of the body. The concept of the black body is an idealization, as perfect black bodies do not exist in nature. Pure graphite, however is a good approximation to a black maerial.

Extraterrestrial solar irradiance matches well to a Blackbody at --- K.

Warm, reddish light corresponds to Blackbody temeratures --- --- K.

Cold, blueish light corresponds to Blackbody temperatures --- --- K.

1: Luminance is a measure of the photometric flux density per unit solid viewing angle, expressed in candela per square meter.

For ----- area sources luminance --- .

1 :Radiometric techniques characterize

2: Consider the shift-invarient system f with time-varying input x(t) and time-varying response y(t).

y(t) = f [x(t)]

Sinewaves are the eigenfunctions of a shift-invarient linear system. Which of the following mathematical statements express this fact correctly?

f [\alpha \;sin (2\pi\omega t\; +\; \psi)] = \beta\;sin  (2\pi\omega t\; + \phi)

2: 

A system is a transformation from one signal—called the input—to another signal—called the output or the response of the system. Assume you have a system f with time-varying input x(t), and time-varying response y(t). Thus:

y(t)=f [ x(t) ]

If you your system ff was a linear system, its input-output relationship obeys two important properties: homogeneity and superposition. Which of the following statements express the propertiy of homogeneity mathematically?

2: An optical system that demonstrates astigmatism is one whose point spread function is ------ . This means that the system's linespread function will depend on the  ----- . 

2: 

A system is a transformation from one signal—called the input—to another signal—called the output or the response of the system. Assume you have a system f with time-varying input x(t), and time-varying response y(t). Thus:

y(t)=f [x(t) ]

If you your system f was a linear system, its input-output relationship obeys two important properties: homogeneity and additivity. Which of the following statements express the propertiy of additivity mathematically?

2: In 1966, Campbell and Gubisch estimated the  ---    of the human eye using the ---   method. They found that for  ---  pupil sizes, the retinal image quality was mainly limited by  ---  .

2: The pointspread and linespread functions describe the spread (blurring) induced by an optical system on a point and a line respectively. Which statements are true

3: Before reaching the photoreceptors, light passes through the:

3: Cones and rods are photoreceptors. Cones are mainly responsive in the --- , meaning they have  --- sensitivity to absolute light levels. They are concentrated in the  --- , and there are estimated to be about --- million cones.

3: Rods are not found in the  ---  [one word]. They express the photopigment  ---  and are mainly sensitive to  ---  wavelength light. There are estimated to be about  ---  million rods.

3: To bring near objects into focus, the ciliary muscles ---  , making the lens of the eye ---  , in a process known as --- . This capacity decreases with age such that by ---   years, accommodation amplitude is less than 2.5 diopters (compared to around ---   diopters for 20-year-olds). 

3: Cells that send signals from the retina to the rest of the brain are called

3: The "blind spot" is a region of the retina containing  --- . It lies on the  --- side of the retina. To find the blind spot in your right eye, focus on a point in front of you, close your left eye, then move your finger  --- from the focal point. 

4: Airport security is very tight. If a traveler even jokes about a bomb, they are detained and questioned to ensure that no real terrorist threat succeeds. In terms of signal detection theory, airport security would rather have a

4: --- is the act of giving meaning to a detected sensation.

4: The method of  --- requires the observer to alter the strength of a stimulus until it matches some criterion.

4: The smallest detectable difference between two stimuli is called the

4: If you are asked to taste a lemon and then adjust a light until it is as bright as the lemon is sour, you have been asked to engage in

4: If a stimulus is absent and the observer reports it as absent, this is called a

4: If a stimulus is present and the observer reports it as absent, this is called a

4: If a stimulus is present and the observer reports it as present, this is called a

4: Stevens’ power law describes the relationship between a

4: Dualism is the idea that

4: In signal detection theory, the  --- is a value that defines the objective difficulty with which an ideal observer could tell the difference between the presence and absence of a stimulus or the difference between two stimuli.

4: The method of  --- requires the experimenter to vary a perceptible stimulus until it is no longer perceived, or an imperceptible stimulus until it is finally perceived.

4: The idea that all matter has consciousness is known as

4: Materialism is the notion that