Which of the following is the most precise device for measuring length: (a) a vernier callipers with 20 divisions on the sliding scale. (b) a screw gauge of pitch 1 mm and 100 divisions on the circular scale. (c) an optical instrument that can measure length to within a wavelength of light?

Asked by Last Modified  

9 Answers

Learn Physics

Follow 9
Answer

Please enter your answer

Guru ji

C
Comments

20 plus years experienced mathematics and physics tutor

Screw gauge,just find the smallest value the instruments can find(L.C.)with given values.
Comments

Guru ji

C
Comments

Home Tutor

Correct answer is (C) an optical instrument that can measure length to within a wavelength of light. And it is because optical instrument has lowest least count than other two instruments provided in the problem.
Comments

Physics Home Tutor

C.
Comments

Tutor

C
Comments

Achieve Ur goals

C
Comments

C IS THE CORRECT ANSWER
Comments

C is the correct answer
Comments

View 7 more Answers

Related Questions

Why does a swimmer push the water backwards?
According to newton's 3rd law of motion in each and every action there is an equal and opposite force. So if he push the water backwards then according to the above principle or law he will be able to move forward.
Profile Photo
Gulfam
0 0
View Comments6
Sun: Largest source of energy is made up of?
Organic molecules.hydrocarbons.fossil fuels.hydrogen and carbon mainly.
Profile Photo
Deepika T.

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Why does water look colourless?
The water is, in fact, not colourless. Even pure water has a slight blue tint to it, best seen when looking through a long column of water. In detail, the absorption of light in water is due to the way...
Profile Photo


Thermal Properties of Matter Overview
https://vz-3ad30922-ba4.b-cdn.net/55e910f5-ad25-4b96-a398-dcfc3ef8709d/play_480p.mp4
Profile Photo


Recommended Articles

Quality education does not only help children to get a successful career and life, but it also hugely contributes to society. The formal education of every child starts from school. Although there are numerous schools, parents find it challenging to choose the right one that would fit their child. It is difficult for them...

Read full article >

With the mushrooming of international and private schools, it may seem that the education system of India is healthy. In reality, only 29% of children are sent to the private schools, while the remaining head for government or state funded education. So, to check the reality of Indian education system it is better to look...

Read full article >

Once over with the tenth board exams, a heavy percentage of students remain confused between the three academic streams they have to choose from - science, arts or commerce. Some are confident enough to take a call on this much in advance. But there is no worry if as a student you take time to make choice between - science,...

Read full article >

Learning for every child starts from a very young age. While the formal methods include school curriculums and private lessons, the informal methods include dancing, music, drawing, and various fun-filling activities. Playing games and practising these types of activities helps the children get out of boredom and...

Read full article >

Looking for Class 11 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you