HC Verma Solutions Vol 1 Chapter 22 Photometry provided here will enable students to enhance their problem-solving skills in tackling questions given in the chapter and question that are related to topics like radiant flux, relative luminosity and luminous flux of source, etc.
What is Luminous Efficiency?
The concept behind a light source able to generate visible light is termed as luminous efficiency.
What is Radiant Flux?
It is referred to the tendency of the energy that is radiated to emit, reflect, transmit, and receive with respect to per unit time.
However, in this chapter students will be dealing with problems like;
- Questions related to finding the luminous efficiency when luminous flux and radiant flux are given and vice versa.
- Questions related to illuminance along with the luminous intensity of source where students will be finding the distance between the source and the original position.
In order to help students understand the concept clearly and solve problems with ease, we are offering free HC Verma Solutions for class 11 physics below. The solutions consist of answers to all the exercises found in chapter 22 of HC Verma book part 1. Students can use the solutions to understand the topics more clearly and learn the right way to tackle questions. Moreover, students can refer the solutions to study well for the exams.
Students will also get to know and learn more about topics like;
- Total Radiant Flux 449
- The luminosity of Radiant Flux 449
- Luminous Flux: Relative Luminosity 449
- Luminous Efficiency
- Luminous Intensity or Illuminating Power 450
- Inverse Square Law 451
- Lambert’s Cosine Law
Important Questions In Chapter 22
1. What are your thoughts about the statement, “a 1 W sodium vapour lamp has a luminous flux of more than that of 10 kW source of ultraviolet radiation.” Give reasons.
2. Can you explain why the sun is less bright in the morning and evening as compared to at noon? Remember the distance of the sun from the observer is almost the same.
3. As the wavelength is increased from violet to red, the luminosity (a) continuously increases (b) continuously decreases (c) increases then decreases (d) decreases then increases.
4. A photographic plate is kept at 5 cm apart from a weak point source and is then exposed for 3 s. What will be the time needed for the same exposure if the plate is kept at a distance of 10 cm from the source?
(a) 48 s (b) 24 s (c) 12 s (d) 3 s
5. Choose the right options.
(a) Radiant flux and Luminous flux have the same dimensions.
(b) Luminous intensity and luminous flux have the same dimensions.
(c) Power and Radiant flux have the same dimensions.
(d) Relative luminosity has no dimensions.
HC Verma Solutions Vol 1 Photometry Chapter 22