Chapter 29: Q15CQ (page 1061)
Your pupils dilate when visible light intensity is reduced. Does wearing sunglasses that lack UV blockers increase or decrease the UV hazard to your eyes? Explain.
It will decrease the effect of UV on your eyes.
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Experiments are performed with ultra cold neutrons having velocities as small as \[{\bf{1}}{\bf{.00}}\;\frac{{\bf{m}}}{{\bf{s}}}\].
(a) What is the wavelength of such a neutron?
(b) What is its kinetic energy in eV?
(a) Find the momentum of a\({\bf{4}}{\bf{.00 - cm}}\)-wavelength microwave photon. (b) Discuss why you expect the answer to (a) to be very small.
(a) What is the wavelength of a \(1.00 - eV\) photon?
(b) Find its frequency in hertz.
(c) Identify the type of EM radiation.
(a) What is the maximum energy in eV of photons produced in a CRT using a \({\bf{25}}{\bf{.0 - kV}}\) accelerating potential, such as a colour TV?
(b) What is their frequency?
What is the velocity of a 0.400 - kg billiard ball if its wavelength is 7.50 cm (large enough for it to interfere with other billiard balls)?
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