Courses
Courses for Kids
Free study material
Offline Centres
More
Store Icon
Store

HC Verma Solutions Class 11 Chapter 22 - Photometry

ffImage
Last updated date: 19th Jun 2024
Total views: 796.8k
Views today: 9.96k

Summary of HC Verma Solutions Part 1 Chapter 22: Photometry

Photometry involves the measurement of light intensity and illuminance. HC Verma discusses the concepts of luminous flux, luminous intensity, and their units of measurement. The chapter covers topics like the brightness of light sources, the behaviour of light as it propagates, and how it interacts with the human eye.


Looking for HC Verma Solutions for Class 11 Physics Chapter 22: Photometry? You can easily find the PDF of HC Verma Solutions for Class 11 Physics Part-1 Chapter 22 - Photometry on Vedantu for free. This fantastic resource allows you to access the solutions anytime and from anywhere, ensuring that you have all the materials you need for your studies.


Download Class 11 HC Verma Solutions Photometry PDF for free, Vedantu aims to provide a flexible and efficient studying experience that will help to score good marks in your exam.


Attention, class 11 champs! It's time to rock in India's most prestigious engineering entrance exams, and we've got a game-changing announcement! With Vedantu as your guiding star this time, achieve your goals and start your preparation today.


At Vedantu, we've got something special just for you. Introducing our Daily Practice Problems (DPP) for JEE Main and Daily Practice Problems (DPP) for JEE Advanced designed specifically for you. We have created some dedicated question sets that will help you to practice in detail on specific topics that will help you to understand the topic well for your exams.


So, why wait? Take that crucial step towards success and start practicing with us today. Get ready to conquer the world of physics and ace your JEE exams. Join us now and let the journey to excellence begin!

Popular Vedantu Learning Centres Near You
centre-image
Mithanpura, Muzaffarpur
location-imgVedantu Learning Centre, 2nd Floor, Ugra Tara Complex, Club Rd, opposite Grand Mall, Mahammadpur Kazi, Mithanpura, Muzaffarpur, Bihar 842002
Visit Centre
centre-image
Anna Nagar, Chennai
location-imgVedantu Learning Centre, Plot No. Y - 217, Plot No 4617, 2nd Ave, Y Block, Anna Nagar, Chennai, Tamil Nadu 600040
Visit Centre
centre-image
Velachery, Chennai
location-imgVedantu Learning Centre, 3rd Floor, ASV Crown Plaza, No.391, Velachery - Tambaram Main Rd, Velachery, Chennai, Tamil Nadu 600042
Visit Centre
centre-image
Tambaram, Chennai
location-imgShree Gugans School CBSE, 54/5, School road, Selaiyur, Tambaram, Chennai, Tamil Nadu 600073
Visit Centre
centre-image
Avadi, Chennai
location-imgVedantu Learning Centre, Ayyappa Enterprises - No: 308 / A CTH Road Avadi, Chennai - 600054
Visit Centre
centre-image
Deeksha Vidyanagar, Bangalore
location-imgSri Venkateshwara Pre-University College, NH 7, Vidyanagar, Bengaluru International Airport Road, Bengaluru, Karnataka 562157
Visit Centre
View More
Competitive Exams after 12th Science
tp-imag
bottom-arrow
tp-imag
bottom-arrow
tp-imag
bottom-arrow
tp-imag
bottom-arrow
tp-imag
bottom-arrow
tp-imag
bottom-arrow

Key benefits of using Class 11 HC Verma Solutions for Chapter 22 - Photometry

  • The solutions are provided by expert Physics teachers, who have a deep understanding of the concepts in the chapter.

  • The solutions cover all of the exercises in the chapter, so students can practice solving problems in a variety of contexts.

  • The solutions are available in a free PDF, so students can access them anytime, anywhere.

  • The given PDF provides a clear and concise explanation of the solutions to the exercises.


About HC Verma Class 11 Solutions For Chapter 22 - Photometry

The word "Photometry" comes from two Greek words, namely "photo" and "metry," which denote something to measure with light. The meaning is that photometry deals with measuring light. It is the science of measuring the intensity of light.


Quantitative measurement of light has great importance in various fields of physics, astronomy, and technology. The early photometry was done by direct inspection of objects with eyes visibly responding to different intensities.


It helped the persons to distinguish between different luminous sources, but it did not provide information about how much light they emitted. In 1838, the French physicist A Camille Chevreul developed a law that defines that brightness or sensation of vision is proportional to 1/6th power of intensity of stimuli. This stimulated the scientists towards further development in this field, and J W von Bezold (1874) placed a blackened silver lining the room of a dark box. He introduced a small hole in the center of this box with which he obtained standard candlelight. This device was named "Bezold's Lumimeter." 


Thus, photometry deals with the quantitative measurement of light using some suitable instruments capable of measuring various parameters of light. These are:-

  • Luminous intensity: It is the power emitted by a light source in particular. The SI unit of luminous intensity is the candela (cd).

  • Luminous flux: It is the total power emitted by a light source in all directions. The SI unit of luminous flux is lumen (lm).

  • Luminous emittance: It is the power emitted by a light source in a particular direction. The SI unit of luminous emittance is lux (lx).

  • Radiance: It is the total power emitted per unit solid angle by a light source in all directions. The SI unit of radiance is watt per steradian (W sr). 

  • Illuminance: It is the power of flux incident on a surface per unit area. The SI unit of illuminance is lux(lx). 


Luminous intensity and Illumination: Luminous intensity and illumination are closely related to each other. They depend upon the nature and position of diffusing surface, intensity, and wavelength of light. For example, a candle flame about 1 cm in diameter emits more illumination on a surface perpendicular to its axis as compared to another placed at 45° to the axis. This is because the candle flame spreads over a larger area as it becomes inclined with respect to the horizontal plane.


HC Verma Volume 1 Solutions Other Chapters:


To make the most of the HC Verma Chapter 22 - Photometry Solutions, Vedantu recommends following these tips:

Begin by thoroughly reading the chapter: Ensure that you grasp the fundamental concepts and terminology before delving into the solutions.

Work through the examples step-by-step: Instead of simply memorizing the solutions, strive to understand the logic and reasoning behind each step.

Attempt the illustrative exercises independently: Challenge yourself to solve the problems on your own first. If you encounter difficulties, you can refer to the solutions for guidance, but attempting them independently enhances your problem-solving skills.

Practice, practice, practice! Remember, the more you practice solving physics problems, the more proficient you will become.


Take advantage of Vedantu's free Class 11 HC Verma Solutions for Chapter 22 - Photometry and embark on an efficient and flexible study routine. With these solutions by your side, you can confidently revise and practice physics concepts, paving the way for academic success.


Class 11 Important Physics Materials:

Excel in Class 11 Physics with Vedantu's remarkable study materials. Strengthen your foundation and soar towards academic excellence!



JEE Important Physics Materials:

Unlock your JEE Physics potential with Vedantu's incredible collection of essential study materials. Accelerate your preparation and conquer the JEE exam with confidence!



NEET Important Physics Materials:

Supercharge your NEET Physics preparation with Vedantu's exclusive collection of essential materials. Gain an edge with expert guidance and unlock your path to success!


FAQs on HC Verma Solutions Class 11 Chapter 22 - Photometry

1. What is the role of a photon in photometry?

Photon is an elementary particle, which can be used to measure the intensity of light using the photoelectric effect. Photon exerts work when it absorbs an electron and ejects it. The number of ejected electrons shows the intensity of light which is measured in terms of the number of photons and not energy. Photons are a unit that is convenient to work with the energy of photons. HC Verma books help students to score more marks by providing various solved questions of different chapters. With the help of HC Verma's book, students get an idea about the exam pattern and how to attempt the exams. Students also get an insight into different topics of physics, which will help them in their future studies.

2. What is the importance of photometry?

Photometry has great importance in various fields of physics, astronomy, and technology. It helps in distinguishing between different luminous sources and also measures their intensities. Photometry is also used to calibrate the instruments used for measuring light. HC Verma books not only help students to score good marks in exams but also provide them with a basic understanding of the concepts of physics. With the help of the HC Verma book, students can develop a strong foundation in physics and also prepare themselves for competitive exams like JEE MAINS AND ADVANCEand other examinations.

3. What is the use of integrating spheres in photometry?

It is used to measure the total radiant flux (power) emitted by a source. It contains a number of small holes on its surface, and these holes admit light from all directions equally. So, the total power entering the sphere is measured and then divided by the number of holes to get the average power per hole. This value is then used to calculate the total power emitted by the source. HC Verma books are designed in such a way that it covers all the topics of physics and helps students to score good marks in exams. These books not only help students to score good marks but also provide them with a basic understanding of the concepts of physics.

4. Explain the term thimble photometer?

The instrument consists of a thimble that has three equally spaced holes, known as an apothem. A photocell with a light detector is made to face these three holes for measurement of light intensity through these three holes respectively. The readings are then averaged to get the final value. HC Verma books not only help students to score good marks in exams but also provide them with a basic understanding of the concepts of physics. With the help of the HC Verma book, students can develop a strong foundation in physics and also prepare themselves for competitive exams, and definitely score well in them.

5. What is the term used for the ratio of electric power input to total power output in a photoelectric circuit?

The term used for the ratio of electric power input to total power output in a photoelectric circuit is called "efficiency." HC Verma books not only help students to score good marks but also provide them with a basic understanding of the concepts of physics. With the help of the HC Verma book, students can develop a strong foundation in physics and also prepare themselves for competitive exams like JEE MAINS, and ADVANCE and other examinations and Vedantu is a platform that helps students to score good marks in exams with the help of Vedantu students can learn physics in detail.