Is this a converging or diverging lens in this drawing? a. converging b. divergi

Question

Is this a converging or diverging lens in this drawing? a. converging b. diverging The image the lens is producing is a. real. b. virtual. In that same drawing, the distance from the letters on the page to the lens is length of the lens is ___ the focal length of the lens. a. greater than b. equal to c. less than This application of a lens is mostly nearly like a(n) a. movie projector b. objective lens in a microscope. c eyepiece lens in a microscope. d. contact lens for a nearsighted person. Most people, if asked, would say that light travels in straight lines, but we physics folks know it can diffract and spread out through small openings, or bend around corners. Why is that notion, that light travels in straight lines, so persistent? Because a. the wavelength of light is so small that we seldom notice light diffracting. b. light is really a particle and not a conventional wave, so it acts differently than other waves. c. we have nothing else to compare light to, so it always seems to go straight. d. most people take things as they learn them and don't ask questions. Why are ultraviolet light microscopes sometimes used in biology labs? They a. sterilize dangerous pathogens automatically. b. can capture images of fast-moving cells. c. can reveal more than normal microscopes because the longer wavelength can capture more information. d. can resolve finer detail than normal microscopes because the UV wavelength is smaller. e. sound cooler, because everything sounds cooler with 'ultraviolet' in front of it. In College Physics I you learned that everything falls alike (if we ignore air friction) because the ratio of an object's weight to its mass is always the same, 9.8 m/s^2. Einstein would explain why that is true: a. the earth pulls on all objects with the same force. b. nature is basically democratic and treats all objects in the same way. c. everything is made of the same up and down quarks and electrons, so they all act the same. d. the space around the objects 'squirts' them down in the same way.

Explanation / Answer

Q32.
the lens in the drawing is magnifying the object . this is only possible by

a converging lens when object is placed at a distance lesser than focal length

hence option a is correct.

Q33.

the image is virtual.

Q34.

as mentioned above, the distance from the letters on the page to the lens is lesser than the focal

length of the lens

hence option c is correct.

Q35.

in a compound microscope,the image formation by the objective is such that,

this image is placed at a distance lesser than focal length of the eyepiece.

hence a bigger and virtual image is created.

this application of a lens is most nearly like eyepiece lens in a microscope

hence option c is correct.

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