A camera has a lens (or combination of lenses) like the converging lens in this

Question

A camera has a lens (or combination of lenses) like the converging lens in this lab that focuses light from objects into real images on a piece if film (like the screen in this lab). An enlarger shines light through a negative, and uses a lens to project a real image of the picture on the negative onto the platform where the photographic paper is placed. Match how each of the following will affect your photographs. Half of the lens on your camera is covered by a piece of paper. A. The size and shape of the image does not change but it becomes dimmer and perhaps fuzzier. Half of the negative is covered by a piece of tape on the inside. B. You get only half of the real image, from the side that isn't covered. C. You get no real image at all. Half of the lens on the enlarger is covered by a piece of paper. D. Nothing changes when you do this. The camera lens is replaced by a diverging lens with the same focal length. You have a converginglens of focal length 20 cm. Match the following based on your observations in the lab. For what range of object distances will the image be larger than the object? For what range of object distances will the image be smaller than the object? For what range of object distances will the image be upright? For what range of object distances will the image be inverted? For what range of object distances will the image be real? For what range of object distances will the image be virtual? A. Object distance is less than 40 cm but greater than 20 cm from the lens. B. Object distance is greater than 40 cm from the lens. C. Object distance is greater than 20 cm from the lens. D. Object distance is less than 20 cm from the lens.

Explanation / Answer

Question 1:

Half of the lens on your camera is covered by a piece of paper :C

Half of the negative is covered by a piece of tape on the inside:D

Half of the lens on the enlarger is coverd by apiece of paper :A

The camera lens is replaced by a diverging lens with the same focal length:C

Question 2:

For what range of object distances will the image larger than the object :A

For what range of object distances will the image smaller than the object:D

For what range of object distances will the image upright:D

For what range of object distances will the image inverted:C

For what range of object distances will the image real:C

For what range of object distances will the image virtual :D

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