Question: An illuminant shaped as a plane horizontal disc S = 100 cm2 in area is suspended over the centre of a round table of radius

An illuminant shaped as a plane horizontal disc S = 100 cm2 in area is suspended over the centre of a round table of radius R = 1.0 m. Its luminance does not depend on direction and is equal to L = 1.6.104 cd/m2. At what height over the table should the illuminant be suspended to provide maximum illuminance at the circumference of the table? How great will that illuminance be? The illuminant is assumed to be a point source.

Step by Step Solution

★★★★★

3.26 Rating (172 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

The equivalent luminous intensity in the dire... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

P-L-G-O (229).docx

120 KBs Word File

Students Have Also Explored These Related Light and Optics Questions!

An illuminant shaped as a plane horizontal disc of radius B = 25 cm is suspended over a table at a height h = 75 cm. The illuminance of the table below the centre of the illuminant is equal to Eo =...

Why is the T-bill's return independent of the state of the economy? Do T-bills promise a completely risk-free return? (2) Why are Alta Industries' returns expected to move with the economy whereas...

A fiber optic cable is suspended over the poles so that the angle at the supports is . Determine the minimum tension in the cable and the sag. The cable has a mass density and the supports are at...

The experimental result differs from the assumption. The result shows that the ring oscillator frequencies can be grouped into two groups, where the first group is the high frequency group for the...

E-Physics Tutorial Book Note: I have attached below the lesson for the 3 activities. Thank you so much for your time and effort. Activity 1. Directions: Use the right-hand rule to determine the...

Sites Pre-Algebra Part II, (Revision B) Exams & Quizzes Log Out 04 - Lessons 4 & 5, Exam 4 Part 1 of 2 - 0.0/ 49.999508 Points 0.0/ 3.3333 Points Question 1 of 30 You cut square corners with side...

Unit 5.3 Rotational Dynamics A skater on ice begins to spin in the camel position, as shown in the figure to the left below. As she continues to spin, she straightens up, pulls her arms to her chest,...

Assessment - Curve Sketching Achievement Level Outcome: Curve Sketching WX Name: Date: For the given function you must determine: x & y - intercepts, Critical Points & Points of Inflection. Show...

11:26 AM Mon Oct 10 83% quest.cns.utexas.edu kolsawala (afk472) - 4-PHY317K-Homework - lang - (57345) 5 sticks to it. angular momentum with respect to the center of the merry-go-round? 1. Li = m2 v R...

QUESTION 23 15 points Save Answer there is no rotation. A green car with mass 900 kg is travelling east at 40 m/s. Simultaneously, a yellow car with mass 1600 kg is travelling north at 30 m/s. They...

Sam Gray, the CEO of Steele Corporation, was meeting with the company controller to discuss a possible major lease of a new production facility. Steele Corporation had a large amount of debt, and Sam...

During the last week of March, Siro Stereos owner approaches the bank for a $125,000 loan to be made on April 1 and repaid on June 30 with annual interest of 10%, for an interest cost of $3,125. The...

According to the text, what is the most widely used flnancing declision technique for determining the best combination of of a . EPS / EBIT analya / s b . capizal asset friting model C . deti - 4 0 -...

Working with a partner, you can get an estimate of your reaction time by catching a falling meter stick. Have your partner hold the meter stick from a point near the top while you place the finger...

Complex formation by 3-aminopyridine and picric acid in chloroform solution gives a yellow product with an absorbance maximum at 400 nm. Neither starting material absorbs significantly at this...

Let c 1 x n + c 2 x n1 + + c n x+c n+1 be a polynomial with a root at x = x 0 . Let cmax be the largest absolute value of a c i . Show that Cmax |xo|

Find V0 in the network shown using nodal analysis. 2 -j1 162 i2 094 400v 2

The voltage across a 50-uF capacitor is shown. Determine the current waveform. v(t), V nu 10 8 10 12 f, ms 10

Use f H data in Appendix L to calculate the enthalpy change of the reaction Speculate on whether such a reaction could be used to fix nitrogen. Would research to find ways to accomplish this...

What is the approximate value for the standard reduction potential of Pb (II) in 1 M base solution? Give a balanced redox half reaction for the process.

Run descriptive statistics: Height 38 28 28 40 29 36 35 28 38 37 35 34 26 26 40 31 30 34 33 28 For these data set (paired sample T-Test) interpret the results in your own words: Before Intervention...

Owen's Electronics has nine operating plants in seven southwestern states. Sales for last year were $100 million, and the balance sheet at year-end is similar in percentage of sales to that of...