The glass envelope of an ordinary incandescent light bulb is filled with a low-pressure mixture of nitrogen and argon gases. If there were no gas at all inside a bulb's envelope, this special bulb would be
A. more energy efficient but would have a shorter operating life than an ordinary bulb.
B. less energy efficient and would have a shorter operating life than an ordinary bulb.
C. less energy efficient but would have a longer operating life than an ordinary bulb.
D. more energy efficient and would have a longer operating life than an ordinary bulb.
Answer:A
The glass envelope of an ordinary incandescent light bulb is filled with a low-pressure mixture of nitrogen and argon gases. If there were no gas at all inside a bulb's envelope, this special bulb would be
A. more energy efficient but would have a shorter operating life than an ordinary bulb. B. less energy efficient and would have a shorter operating life than an ordinary bulb. C. less energy efficient but would have a longer operating life than an ordinary bulb. D. more energy efficient and would have a longer operating life than an ordinary bulb.