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IP Halogen Light bulbs Modern halogen light bulbs allow
Chapter 30, Problem 8P(choose chapter or problem)
Problem 8P
IP Halogen Light bulbs Modern halogen light bulbs allow their filaments to operate at a higher temperature than the filaments in standard Incandescent bulbs. For comparison, the filament in a standard light bulb operates at about 2900 K, whereas the filament in a halogen bulb may operate at 3400 K.
(a) Which bulb has the higher peak frequency? (b) Calculate the ratio of peak frequencies (f hal/f std). (c) The human eye is most sensitive to a frequency around 5.5 × 1014 Hz. Which bulb produces a peak frequency closer to this value?
Questions & Answers
QUESTION:
Problem 8P
IP Halogen Light bulbs Modern halogen light bulbs allow their filaments to operate at a higher temperature than the filaments in standard Incandescent bulbs. For comparison, the filament in a standard light bulb operates at about 2900 K, whereas the filament in a halogen bulb may operate at 3400 K.
(a) Which bulb has the higher peak frequency? (b) Calculate the ratio of peak frequencies (f hal/f std). (c) The human eye is most sensitive to a frequency around 5.5 × 1014 Hz. Which bulb produces a peak frequency closer to this value?
ANSWER:
Step 1 of 3:-
a)
Here, we have to find which of the bulb has higher peak frequency.
We know from Wien’s displacement law that,
As, the temperature of halogen bulb is more than the standard bulb, the peak frequency of the halogen bulb is higher.