+1-415-315-9853

info@mywordsolution.com

 Algebra Math Calculus Physics Chemistry Biology Earth Science Physiology History Humanities English Sociology Nursing Science

problem 1)a) Define and describe the terms:

i) Luminance.

ii) Illuminance.

b) Two isotropic point sources A and B are suspended at a height of 3m and 4m respectively above horizontal working plane. The luminous intensities are 1800Cd and 2000Cd respectively. What should be the distance between the lamps, so that the illuminance at point on the working plane directly below A is 75lux more than at the point directly below B?

c) Describe the terms Photopic, Scotopic and Mesopic visions in terms of lighting levels and photoreceptors. Draw appropriate sketches.

problem 2)a) What is incandescence? What is the importance of selecting tungsten as the filament material for incandescent lamps?

b) What do you mean by refraction? How is it significant for lighting applications?

c) What do you mean by thermal radiators? Draw the energy distribution curve of a black body radiator and describe it.

problem 3)a) Describe the halogen regenerative cycle? Mention the advantages of tungsten halogen lamps as compared to GLS incandescent lamps.

b) Describe the classification of luminaries with regards to symmetry of light distribution.

problem 4) Describe with neat sketches, the four basic techniques used for the measurement of photometric characteristics of a luminaire using Gonio photometer?

• Category:- Physics
• Reference No.:- M96295

Have any Question?

## Related Questions in Physics

### Wastewater containing solute a at a concentration of 10

Wastewater containing solute A at a concentration of 1:0 × 10 -3  g mol=m 3  enters an open tank at a volumetric flow rate of 0:2 m 3 /min, and exits at the same rate. Solute A transfers from the wastewater in the open t ...

### 1 what is the probability of block error of the n k hamming

1. What is the probability of block error of the (N, K) Hamming code to leading order, when the code is used for a binary symmetric channel with noise density f? 2. Prove that there exist families of codes with ‘bad' dis ...

### Question 1a in no more than 200 words briefly explain both

Question 1 (a) In no more than 200 words, briefly explain both the similarities and differences between Newton's law of universal gravitation and Coulomb's law. (b) Consider two point-like objects, A and B, the first of ...

### Calculate the dose in sv to the chest of a patient given an

Calculate the dose in Sv to the chest of a patient given an x-ray under the following conditions. The x-ray beam intensity is 1.50 W/m 2, the area of the chest exposed is 0.0750 m 2 , 35.0% of the x-rays are absorbed in ...

### A 021-kg apple falls from a tree to the ground 40 m below

A 0.21-kg apple falls from a tree to the ground, 4.0 m below. Ignoring air resistance, determine the apple's kinetic energy, K, the gravitational potential energy of the system, U, and the total mechanical energy of the ...

### Calculate a for the isothermal compression of 295 mol of an

Calculate ?A for the isothermal compression of 2.95 mol of an ideal gas at 325 K from an initial volume of 60.0 L to a final volume of 20.5 L. Does it matter whether the path is reversible or irreversible?

### The moment just after the battery is turned on what is the

The moment just after the battery is turned on, what is the voltage across the resistor, the inductor, and the capacitor each? What is the current in the circuit? Explain your reasoning.

### Several thin sheets of naphthalene 025 cm thick and 10 cm

Several thin sheets of naphthalene, 0.25 cm thick and 10 cm square, are arranged parallel to each other with their centers at 1-cm intervals. Air at 273 K and 1:013 × 10 5  Pa enters this sandwich arrangement with a bulk ...

### Reconcile the two problems problem 1 and problem 2 by

Reconcile the two problems. Problem 1 and Problem 2, by estimating a oxide trap concentration for Problem 1 and a trapping efficiency for problem 2. Problem 1 Electrons are slowly injected by tunneling Into the SiO 2  fr ...

### A thin polymer film contains some residual liquid solvent

A thin polymer film contains some residual liquid solvent. It is desired to evaporate the solvent (n-hexane, solute A) from the polymer using the process shown below. Both sides of the polymer film are exposed to the cro ...

• 13,132 Experts

## Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

### WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

### Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

### Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

### Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

### Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro