A telescope is used to view two small lights separated by 2.0 cm at a distance of 500 m. What minimum objective lens diameter is needed to just resolve these objects if their wavelength is 656 nm?
a. 2.0 cm
c. 1.2 cm
b. 1.0 cm
d. 2.4 cm
A
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Dimensional Analysis: When adding several quantities
A. the quantities can have any combination of units. B. the quantities must all have exactly the same units. C. the quantities must all be dimensionless.
Which of the following statements about Saturn's moon Titan is not true?
A) It rains liquid methane and ethane. B) Its atmosphere contains abundant oxygen. C) Its temperature is too cold for liquid water to exist on its surface. D) Its surface is hidden from view by a thick atmosphere. E) It orbits Saturn.
A spaceship approaching an asteroid at a speed of 0.6 c launches a scout rocket with speed 0.4 c. At what speed is the scout rocket approaching the asteroid?
A) 0.81 c B) 1.00 c C) 0.76 c D) 0.64 c E) 0.96 c
Magnification can be accomplished with a hologram when viewed with light that has a
A) longer wavelength than the original light. B) shorter wavelength than the original light. C) neither for holograms cannot be magnified.