The Objective and the Eyepiece of a Refracting Astronomical Telescope

question 2

Multiple Choice

The objective and the eyepiece of a refracting astronomical telescope have focal lengths of 320 cm and 4.0 cm,respectively.The telescope is used to view Neptune and the final image is set at infinity.The diameter of Neptune is 4.96  107 m and the distance from Earth at the time of observation is 4.4  1012 m.The angle subtended by the final telescopic image of Neptune,in m rad,is closest to:

• A)0.9
• B)1.1
• C)1.3
• D)1.5
• E)1.7

Understand the structure and functions of the neuron's plasma membrane.

Explain the mechanisms of action potentials and local potentials.

Distinguish between the compositional and functional differences of gray and white matter.

Describe the factors influencing the resting membrane potential and its significance in neuronal function.

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