What kind of telescope can be effectively used from the ground (i.e. it need not be in space)?
A) gamma-ray
B) X-ray
C) ultraviolet
D) infrared
E) radio
Ans: E) radio
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Compound Microscope: A compound microscope consists of an objective lens of focal length f0 and an eyepiece that by itself produces an angular magnification 25.0. The microscope is designed so that the object to be viewed is on the left side of the objective lens and is focused in a plane that is 28.00 cm away from the right-hand (or inside) focal point of the objective lens. When properly adjusted, the eyepiece and the objective lens are 29.90 cm apart. The eyepiece magnification is based on an image at infinity and a near point at 25.0 cm. What is f0?
Fill in the blank(s) with the appropriate word(s).
The objective and the eyepiece of a microscope have focal lengths of 4.00 mm and 25.0 mm, respectively
The objective produces a real image 30 times the size of the object. The final image is viewed at infinity, and the near point of the microscope user is at 25.0 cm. What is the distance between the object and the focal point of the objective? A) 0.13 mm B) 0.18 mm C) 0.23 mm D) 0.28 mm E) 0.33 mm
Assuming that no energy is lost in the form of heat, after the ball compresses the spring shown here, what is the maximum potential energy it may once again attain?
a. 0 J. b. 5 J. c. 2.5 J. d. Significantly less than 5 J because of energy lost as heat because of friction. e. Significantly less than 2.5 J because of energy lost as heat because of friction.
Explain the significance of the Lyman Alpha Forest in studying the universe on the grandest of scales
What will be an ideal response?