Physics

The wavelength of light is 589 nm. What is its order of magnitude in metre?


SOLUTION
1 nm is $$1\times { 10 }^{ -9 }m$$.
So, $$589nm = 5.89\times1\times { 10 }^{ 2 }\times { 10 }^{ -9 }m$$.
Hence its magnitude in m is $${ 10 }^{ -7 }m$$
View Answers

You're just one step away

Create your Digital Resume For FREE on your name's sub domain "yourname.wcard.io". Register Here!


Subjective Medium Published on 18th 08, 2020
Next Question
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 218
Enroll Now For FREE

Realted Questions

Q1 Subjective Medium
A barometer is faulty. When the true barometer reading are 73 and 75 cm of Hg, the faulty barometer reads 69 cm and 70 cm respectively. What is the total length of the barometer tube?

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q2 Single Correct Medium
The velocity v of a point at time t is given by $$ v=at+\dfrac{b}{t+c} $$. The dimension of ab and c are respectively:
  • A. $$ LT^{-1}L^{-1} $$ and $$ T $$
  • B. $$ LT^2,L $$ and $$ T $$
  • C. $$ LT^{-2},L $$ and $$ T $$
  • D. $$ L, LT $$ and $$ T^2 $$

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q3 Single Correct Medium
Surface tension of liquid is $$70$$ $$dyne/cm$$. Its value in SI unit is
  • A. $$70 \ N/m$$
  • B. $$7\times 10^{-2}N/m$$
  • C. $$7\times 10^{2}N/m$$
  • D. $$7\times 10^{3}N/m$$

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q4 Subjective Medium
A traditional unit of length in Japan is the ken $$(1\ ken=1.97\ m)$$. What are the ratios of
square kens to square meters ?

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q5 Multiple Correct Medium
Which of the following groups have the same dimensions ?
  • A. velocity, speed
  • B. pressure, stress
  • C. force, impulse
  • D. work, energy

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer