PMU - Year 1 Physics - Part 3(B)

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According to Stokes shift, if λ is the wavelength of stimulating radiation and λ2 - of the emitted luminescence radiation, then:

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Quantum yield (Wavilov's law) is defined as:

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Phosphorescence is when an electron has returned to singlet (basic) level, passing through an intermediate level that is:

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The following statement: "Under the influence of a photon with suitable energy, the electron returns to singlet state from the metastable level" describes:

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The active medium of a laser must have:

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Light is monochromatic when:

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The output mirror of laser resonator is:

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The laser can be:

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The laser is:

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Light generation in a laser is a result of:

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Separation of tissue fragments with a laser, without causing necrosis to underlying cells is called:

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Electromagnetic waves are coherent when:

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What is the definition for population inversion?

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Laser radiation DOES NOT have the properties of:

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What properties summarize laser light the best:

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Lasers produce light with specific properties through:

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Laser endoscopes are preferred to light endoscopes. Which of the statements below is NOT a factor for this choice:

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PDT of endobronchial cancer uses a laser of 630 nm wavelength. In what of the range is this emission:

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In photo-dynamic therapy (PDT), excitation wavelength is specific to the photo-sensitizing drug used. What type of laser light is suitable for HpD photosensitizer with 410 nm emission:

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Photodynamic therapy of mild jaundice in babies (elevated bilirubin causes yellow skin pigmentation) turns bilirubin into more soluble form, easier to excrete from the body. What type of laser light is most suitable for skin treatment:

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In photo-dynamic therapy, malignant tissue is selectively destroyed by a combination of:

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Photodynamic therapy based on:

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In a optical microscope the object is located at a distance

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In an optical microscope, where is the object located with respect to the eyepiece lens:

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The image formed by the microscope lens is:

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The image formed by the microscope eyepiece is:

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The image formed by a compound microscope is:

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What feature of the human eye limits the maximum magnification of optical microscope:

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A negative magnification always means that the image is:

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UV microscopes do not have any significant applications in medicine despite their maximum useful magnification which is about 2 times higher than that of the conventional microscope because:

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After passing through a convex lens, rays of light traveling parallel to the axis, will be refracted to the lens:

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When an object is located at distance greater than two focal lengths in front of a converging lens, the image will be:

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Virtual images formed by converging lenses would appear:

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What wave phenomenon allows the existence of optical microscopes:

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In an optical microscope, Wavelength of light is changed from 550 nm to 450 nm. The numerical aperture (NA) stays the same same. The resolution will:

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Electron microscopes have better resolution than light microscopes. This is because:

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Electron microscopes use special lenses such as:

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The human eye is most sensitive to:

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Which wavelength λ is not perceived by the human eye:

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The optical power of the human eye is approximately equal to:

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2/3 of human eyes optical power is due to the air-cornea interface. This is because:

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The image formed on the retina of the human eye is at a distance:

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The image formed on the retina is:

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Nature has deprived human eyes from IR vision, which some animals poses. Is this expedient:

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Can you tell by looking at a person's eyes and spectacles, if they have myopia or hyperopia? Which of the statements below is not correct?

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Which human organ is "responsible" for inter-eye coordination:

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Astigmatism is due to:

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The stroboscopic effect is due to:

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What type of lenses are used for correction of myopia (short-sightedness)

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What type of lenses are used for correction of hypermetropia (far-sightness)

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What type of lenses are used for correction of astigmatism:

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Snell's window is an underwater phenomenon where a submerged observer looking up could see the entire hemisphere, horizon to horizon. In this case, a 180 degree view above water is compressed into a 97 degree angle under water (Figure 10, not included). This is possible because:

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Fish eyes are remarkably similar to human eyes. One significant different is the shape of crystalline lens. In fish they are denser and more spherical. This adaptation can be contributed to:

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The following can be described as refractive disorders of the eye:

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Underwater vision (for humans) is blurry. The focusing power of the cornea is greatly reduced when in contact with water. Why is that? :

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Which statement describes correctly the photoreceptor cells of the retina

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There are three types of colour sensitive cone cells in the retina. Two types overlap significantly in their spectral sensitivity and one does not overlap much with the other two. Which are the two overlapping colours?

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Human eyes are the most sensitive to green light at 550 nm wavelength. What is the best explanation for this adaption:

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In addition to their eyes, Rattlesnakes have a pair of sensory organs called "Pits". Pits have a short range and are used mostly in night hunting. What type of waves can pits detect?

All Questions uploaded word for word from MCQ book. All Credit to Authors. Mistakes due in process may have been made, use and check your work at your own discretion. Only simple writing allowed, i.e Superscript and Subscript absent. Questions missed due to Figure/Diagrams/Text: 69.89.90.106.

PMU - Year 1 Physics - Part 3(B)

PMU - Year 1 Physics - Part 3(B)

According to Stokes shift, if λ is the wavelength of stimulating radiation and λ2 - of the emitted luminescence radiation, then:

Quantum yield (Wavilov's law) is defined as:

Phosphorescence is when an electron has returned to singlet (basic) level, passing through an intermediate level that is:

The following statement: "Under the influence of a photon with suitable energy, the electron returns to singlet state from the metastable level" describes:

The active medium of a laser must have:

Light is monochromatic when:

The output mirror of laser resonator is:

The laser can be:

The laser is:

Light generation in a laser is a result of:

Separation of tissue fragments with a laser, without causing necrosis to underlying cells is called:

Electromagnetic waves are coherent when:

What is the definition for population inversion?

Laser radiation DOES NOT have the properties of:

What properties summarize laser light the best:

Lasers produce light with specific properties through:

Laser endoscopes are preferred to light endoscopes. Which of the statements below is NOT a factor for this choice:

PDT of endobronchial cancer uses a laser of 630 nm wavelength. In what of the range is this emission:

In photo-dynamic therapy (PDT), excitation wavelength is specific to the photo-sensitizing drug used. What type of laser light is suitable for HpD photosensitizer with 410 nm emission: