Chapter 25: Q21CQ (page 928)
Is it necessary to project a real image onto a screen for it to exist?
Short Answer
No, even without projection, an actual image exists.
Chapter 25: Q21CQ (page 928)
Is it necessary to project a real image onto a screen for it to exist?
No, even without projection, an actual image exists.
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Get started for freeA certain slide projector has a \(100{\rm{ }}mm\) focal length lens.
(a) How far away is the screen, if a slide is placed \(103{\rm{ }}mm\) from the lens and produces a sharp image?
(b) If the slide is \(24.0\) by \(36.0{\rm{ }}mm\), what are the dimensions of the image? Explicitly show how you follow the steps in the Problem-Solving Strategy for lenses.
Will light change direction toward or away from the perpendicular when it goes from air to water? Water to glass? Glass to air?
Models are particularly useful in relativity and quantum mechanics, where conditions are outside those normally encountered by humans. What is a model?
(a) A narrow beam of light containing yellow (580 nm) and green (550 nm) wavelengths goes from polystyrene to air, striking the surface at aincident angle. What is the angle between the colours when they emerge? (b) How far would they have to travel to be separated by 1.00 mm?
Explain why an object in water always appears to be at a depth shallower than it actually is? Why do people sometimes sustain neck and spinal injuries when diving into unfamiliar ponds or waters?
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