Describe at least three advantages of CCD imaging over visual or photographic work
What will be an ideal response?
The CCD is far more efficient in capturing light than the fastest film, so fainter objects can be imaged with much shorter exposures or with smaller, cheaper telescopes. The image is digital, and can be monitored as it is building up for quality assurance; you don't have to wait to develop the film to know that you have good data. This digital image is easily stored on computers, and quickly shared with others via the Internet and many other media.
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Reducing the magnetic field to 71% of its previous value changes the magnetic energy density in the field to _______% of its original value.
A. 39 B. 50 C. 71 D. 85 E. 15
The focal lengths of the objective and the eyepiece of a microscope are 0.5 cm and 2.0 cm, respectively, and their separation adjusted for minimum eyestrain is 6.0 cm
If the microscope is focused on a small object, what is the distance between the object and the objective lens? A) 0.6 cm B) 0.3 cm C) 0.4 cm D) 0.8 cm E) 0.7 cm
An electrically neutral particle composed of two or more atoms chemically combined is called a(n) ______________
Fill in the blank(s) with correct word
A rifle sight is set so that you will hit a target at 100m. If, instead, you wish to hit a target closer than 100m, should you aim high or low?
A. You should aim high, since the bullet will drop due to the effect of gravity B. You should aim directly at the target, if the rifle sight is set, it will aim true no matter the distance to the target C. You should aim low, since the bullet will not drop as much as expected due to the effect of gravity