preparation of science exam-G9

What is a punctum remotum?

• A longest distance that sufferer can see clearly

• A shortest distance that sufferer can see clearly

• Distance between lens and an object

• Distance between lens and an image

He suffers from myopia and he uses a glass to see an object clearly. Where is location of an image?

• at Sn

• at an unlimited distance

• at focus of lens

• at punctum remotum

When a grandfather who suffers hypermetropia uses glass, where is a location of an object and location of an image?

• An object is at Sn and an image is at punctum remotum

• An object is at Sn and an image is at punctum proximum

• An object is at focus and image is at punctum remotum

• An object is at focus and image is at punctum proximum

Where is location of an object in usage of the magnifying glass in accommodation-eyes?

• At focus

• in front of focus

• between focus and 2 focus

• at infinite

Where is location of an object in usage of the magnifying glass in non-accommodation-eyes?

• at focus

• in front of focus

• between focus and 2 focus

• at infinite

What is a magnification of the microscope in usage of the accommodation-eyes?

• M = S'ob/Sob x Sn/foc

• M = S'ob/Sob x (Sn/foc) + 1

• M = Sob/S’ob x Sn/foc

• M = Sob/S’ob x (Sn/foc) + 1

In usage of microscope, an object is located …….

• In front of focus of an objective lens

• At focus of an objective lens

• Between focus and 2 focus of an objective lens

• Behind 2f of an objective lens

In usage of microscope with non-accommodation-eyes, the distance between 2 lens is …..

• S’ob + Soc

• S’ob + Foc

• Sob + Soc

• Fob + Foc

When you use a camera, where is location of an object?

• between f and 2 f

• at 2f

• behind 2f

• at f

The characteristics of the final image in usage of microscope are ……

• Bigger, virtual, upright

• Bigger, real, inverted

• Smaller, virtual, upright

• Smaller, real, inverted