A nanometre is equal to
A. 10-6 cm
B. 10-7 cm
C. 10-8 cm
D. 10-9 cm
Answer: Option B
Solution (By Examveda Team)
"Nano" is a prefix that means one billionth (1/1,000,000,000).A nanometer (nm) is therefore one billionth of a meter.
We know that 1 meter (m) = 100 centimeters (cm).
So,
1 nanometer (nm) = (1/1,000,000,000) meter = (1/1,000,000,000) × 100 cm
This simplifies to:
1 nm = 100 / 1,000,000,000 cm = 1 / 10,000,000 cm
In scientific notation:
1 / 10,000,000 = 10⁻⁷
Therefore, 1 nanometer = 10⁻⁷ cm.
✔ Correct Answer: Option B – 10⁻⁷ cm
This Question Belongs to Physics GK Chapter Wise >> Unit And Measurement
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A. Weight and Velocity
B. Weight and Force
C. Weight and Mass
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A. cannot be measured
B. can be expressed in the form of law
C. can be represented completely by its magnitude and unit
D. Both B and C
A. a-2, b-3, c-1, d-4
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Answer D
10power-9