Question #254

Now we make the antenna half of its original length (2.47 m rather than 4.95 m in length), keeping everything else the same. The two ends of the antenna are shown without the fluorescent bulb, with the far end the same as in Question 253.

What will happen now when we move the light along the antenna?

What will the bulb do?

• (a) start bright and decrease intensity.
• (b) start dim and increase intensity.
• (c) start bright, oscillate in intensity, and end dim.
• (d) start dim, oscillate in intensity, and end bright.
• (e) other.

Now suppose that we connect the two wires at the far end of the antenna but keep the end by the oscillator the same.

What will happen now when we move the light along the antenna?

The bulb will:

• (a) start bright and decrease intensity.
• (b) start dim and increase intensity.
• (c) start bright, oscillate in intensity, and end dim.
• (d) start dim, oscillate in intensity, and end bright.
• (e) other.

Click here for Answer #254 after May 22, 2006.

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