Question 1

Of the following, _________ has the maximum frequency.&#10;A)uv rays&#10;B)gamma rays&#10;C)microwaves&#10;D)radio waves

Accepted Answer

Gamma rays have the highest frequency among the options listed. Frequency decreases from gamma rays to UV rays, then microwaves, and finally, radio waves have the lowest frequency.

Question 2

In the Visible spectrum the ______ colour has the maximum wavelength.&#10;A)violet&#10;B)blue&#10;C)red&#10;D)yellow

Accepted Answer

In the visible spectrum, red has the maximum wavelength, ranging from approximately 620 to 750 nanometers.

Question 3

Wavelength and frequency are related as : (c = speed of light)&#10;A)c = wavelength / frequency&#10;B)frequency = wavelength / c&#10;C)wavelength = c * frequency&#10;D)c = wavelength * frequency

Accepted Answer

The correct relationship between wavelength ($\lambda$), frequency ($f$), and the speed of light ($c$) is given by $c = \lambda \times f$. This equation shows that the speed of light is equal to the product of the wavelength and the frequency of the light wave.

Question 4

Electromagnetic waves can be visualised as a&#10;A)sine wave&#10;B)cosine wave&#10;C)tangential wave&#10;D)none of the above

Accepted Answer

The answer of Electromagnetic waves can be visualised as a&#10;A)sine...

Question 5

How is radiance measured?&#10;A)lumens&#10;B)watts&#10;C)armstrong&#10;D)hertz

Accepted Answer

Radiance is measured in watts per steradian per square meter (W/sr·m²), which quantifies the amount of light power emitted, reflected, transmitted, or received by a surface.

Question 6

Which of the following is used for chest and dental scans?&#10;A)hard x-rays&#10;B)soft x-rays&#10;C)radio waves&#10;D)infrared rays

Accepted Answer

Soft x-rays are used for chest and dental scans because they have the right energy level to image soft tissues and bones with high contrast, making them ideal for medical imaging applications. Hard x-rays, with their higher energy, are more penetrating and are used for imaging denser materials. Radio waves and infrared rays are not typically used for these types of scans.

Question 7

Which of the following is impractical to measure?&#10;A)frequency&#10;B)radiance&#10;C)luminance&#10;D)brightness

Accepted Answer

Brightness is subjective and varies from person to person, making it impractical to measure objectively. Frequency, radiance, and luminance can be measured with scientific instruments.

Question 8

Massless particle containing a certain amount of energy is called&#10;A)photon&#10;B)shell&#10;C)electron&#10;D)none of these

Accepted Answer

A photon is a massless particle that carries electromagnetic energy, including light. Electrons, in contrast, have mass, and "shell" does not refer to a specific particle in this context.

Question 9

What do you mean by achromatic light?&#10;A)chromatic light&#10;B)monochromatic light&#10;C)infrared light&#10;D)invisible light

Accepted Answer

Achromatic light refers to light that does not have a hue, typically because it consists of multiple wavelengths in a way that results in a perception of white or grey. Monochromatic light, consisting of a single wavelength, is often used in the context of discussing achromatic perception because it contrasts with polychromatic (having multiple wavelengths) light, which can have hue. However, the term "achromatic light" is more accurately associated with light that appears white or grey, such as a mix of wavelengths that do not stimulate the color-sensing cones in the eye to produce a color sensation. This explanation corrects the initial response, as "monochromatic light" actually refers to light of a single wavelength and is not the correct answer. The correct understanding is that achromatic light is perceived without color, typically as white, black, or shades of grey, which results from a mix of wavelengths or the absence of light, not from monochromatic light.

Question 10

Which of the following embodies the achromatic notion of intensity?&#10;A)luminance&#10;B)brightness&#10;C)frequency&#10;D)radiance

Accepted Answer

The answer of Which of the following embodies the achromatic...

Question 11

Which of the following is a receptor in the retina of human eye?&#10;A)rods&#10;B)cones&#10;C)rods and cones&#10;D)neither rods nor cones

Accepted Answer

The answer of Which of the following is a receptor...

Question 12

How is image formation in the eye different from that in a photographic camera&#10;A)no difference&#10;B)variable focal length&#10;C)varying distance between lens and imaging plane&#10;D)fixed focal length

Accepted Answer

The answer of How is image formation in the eye...

Question 13

Range of light intensity levels to which the human eye can adapt (in Log of Intensity-mL) A)10^-6 to 10^-4 B)10⁴ to 10⁶ C)10^-6 to 10⁴ D)10^-5 to 10⁵

Accepted Answer

The answer of Range of light intensity levels to which...

Question 14

What is subjective brightness?&#10;A)related to intensity&#10;B)related to brightness&#10;C)related to image perception&#10;D)related to image formation

Accepted Answer

The answer of What is subjective brightness?&#10;A)related to intensity&#10;B)related to...

Question 15

What is brightness adaptation?&#10;A)changing the eye's overall sensitivity&#10;B)changing the eye's imaging ability&#10;C)adjusting the focal length&#10;D)transition from scotopic to photopic vision

Accepted Answer

The answer of What is brightness adaptation?&#10;A)changing the eye's overall...

Question 16

The inner most membrane of the human eye is&#10;A)blind spot&#10;B)sclera&#10;C)choroid&#10;D)retina

Accepted Answer

The answer of The inner most membrane of the human...

Question 17

What is the function of Iris?&#10;A)source of nutrition&#10;B)detect color&#10;C)varies focal length&#10;D)control amount of light

Accepted Answer

The answer of What is the function of Iris?&#10;A)source of...

Question 18

________ serve to a general, overall picture of the field of view.&#10;A)cones&#10;B)rods&#10;C)retina&#10;D)all of the mentioned

Accepted Answer

The answer of ________ serve to a general, overall picture...

Question 19

Ratio of number of rods to the number of cones is _______&#10;A)1:20&#10;B)1:2&#10;C)1:1&#10;D)1:5

Accepted Answer

The answer of Ratio of number of rods to the...

Question 20

The absence of receptors is in the retinal area called _____________&#10;A)lens&#10;B)ciliary body&#10;C)blind spot&#10;D)fovea

Accepted Answer

The answer of The absence of receptors is in the...

Question 21

The most familiar single sensor used for Image Acquisition is&#10;A)microdensitometer&#10;B)photodiode&#10;C)cmos&#10;D)none of the mentioned

Accepted Answer

The answer of The most familiar single sensor used for...

Question 22

A geometry consisting of in-line arrangement of sensors for image acquisition&#10;A)a photodiode&#10;B)sensor strips&#10;C)sensor arrays&#10;D)cmos

Accepted Answer

The answer of A geometry consisting of in-line arrangement of...

Question 23

CAT in imaging stands for&#10;A)computer aided telegraphy&#10;B)computer aided tomography&#10;C)computerised axial telegraphy&#10;D)computerised axial tomography

Accepted Answer

The answer of CAT in imaging stands for&#10;A)computer aided telegraphy&#10;B)computer...

Question 24

The section of the real plane spanned by the coordinates of an image is called the _____________&#10;A)spacial domain&#10;B)coordinate axes&#10;C)plane of symmetry&#10;D)none of the mentioned

Accepted Answer

The answer of The section of the real plane spanned...

Question 25

The difference is intensity between the highest and the lowest intensity levels in an image is ___________&#10;A)noise&#10;B)saturation&#10;C)contrast&#10;D)brightness

Accepted Answer

The answer of The difference is intensity between the highest...

Deck 1: Light, Electromagnetic Waves, and Vision