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Joint Entrance Examination (JEE Main Paper 1)

Organized By: National Testing Agency (NTA)


Applicable For

Under Graduate

Course Level


Exam Date

Click Here

Registration Link

1000 (INR)

Registration Fee


Maximum Marks


No of Questions


Exam Mode

English + 12

Paper Language

2 /Year

Conduct Frequency

National Entrance

Exam level


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All About Photometry - Download Notes (JEE Main)

What is Photometry?

Optical instruments are devices that utilize the principles of optics, the study of light, to manipulate, detect, or analyze light and its properties. These instruments are designed to interact with light to enhance our ability to see, measure, or study objects, phenomena, or signals.

Download PDF On Photometry

Download PDF

Table of Contents

1. Important Definitions.

2. Relation between Luminous Intensity (L) and Illuminance (I).

3. Lambert’s Cosine Law of Illuminance.

4. Photometer and Principle of Photometry

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