James is helping Padfoot find more information about the Resurrection Stone. In the restricted section of the library, He finds a book written by Godric Gryffindor himself, but the writing is so small that she cannot read it without a magnifying glass. What kind of lens does a magnifying glass have? James has normal vision, and the book is placed 30 cm away from his face. To read Gryffindor’s script, he needs the image to be enlarged by a factor of 3. How far away from his face should he hold the magnifying glass, if it has a focal length of 15 cm?
James is helping Padfoot find more information about the Resurrection Stone. In the restricted section of the library, He finds a book written by Godric Gryffindor himself, but the writing is so small that she cannot read it without a magnifying glass.
What kind of lens does a magnifying glass have?
James has normal vision, and the book is placed 30 cm away from his face. To read Gryffindor’s script, he needs the image to be enlarged by a factor of 3. How far away from his face should he hold the magnifying glass, if it has a focal length of 15 cm?
The optical axis below has equal-spaced tick marks. On the axis, draw a diagram showing the object (book), the lens (magnifying glass), and the image. Show three principal rays for this situation. Assume James's face is at the right edge of the diagram, so light goes from left to right. Label the tick marks clearly (in cm).
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