Four lamps are suspended 6m above the ground at the corners of a lawn 4m on each side. If each lamp emits 250 cd, calculate the illumination at the center of the lawn. Draw the figure.

Q: Determine the y-coordinate of the centroid of the shaded area. T\/ 0.37h 1/ 61⁰61° Answer:ỹ = y 1 i…

A:

Q: When the sun is directly overhead, it produces an illuminance of 105,000 lux on a horizontal surface…

A:

Q: Determine the coordinates of the centroid of the shaded area. y

A: To determine the coordinates of Centroid of the shaded area.

Q: If n= 1.30, what is the largest angle of incidence 0, for which total internal reflection will occur…

A: When light travels from one medium to another it undergoes refraction, the angle of refraction is…

Q: How many nanoseconds does it take light to travel a distance of 6.50 km in a vacuum?

A: Distance travelled,  Speed of light,    The time taken can be calculated from the expression

Q: An oscillator with period 3.0 ms passes through equilibrium at t = 6.8 ms with velocity v = -3.4…

A: The time period of an oscillator is, The velocity of an oscillator is, The time at which…

Q: Light is incident on a piece of glass in air at an angle of 45 degrees from the normal. If the index…

A: Given data: Index of refraction of air (n1) = 1 Angle of incidence (i) = 45° Index of refraction of…

Q: Plot the graph of n₁sin (0₁) vs sin (0₂). Perform regression analysis and determine the equation of…

A:

Q: c) f = tan 0.785 - x 9.8 cos 0.785 x = 1.3, 8x = ±0.2 ==

A: The problem seems to be incomplete. The given information is:f = tan 0.7859.8 cos 0.785x = 1.38x =…

Q: What would be the speed of light through a particular medium if the frequency is 6.14 x 106 Hz and…

A:

Q: A 42.9 ft American flag casts a 253.1 ft shadow.  In the same sunlight, a 6.2-foot man casts what…

A:

Q: n = 1.7 and (A beam of light) θ₀ = 17°.  Calculate θᵣ, the reflected angle.

A: From law of reflection,

Q: What would be the refractive index of a compound at 20 C, if its refractive index was at 22.8 C and…

A: Refractive index values are usually determined at standard temperature. . At higher temperature ,…

Q: A physicist is hired to do some decorating at a celebration. The client is very keen on including…

A: Given that:λ=581.0 nm=581.0×10-9 mLength of the wedge, L=5.00 mTotal number of fringes, N=365air…

Q: a. A scale balances with four blue x-blocks on one side and 36 green blocks on the other side.…

A: A scale balances with four blue x-blocks on one side and 36 green blocks on the other side. From…

Q: 1. The distance from the man's eyes to the ground is 1.78 m. The oil drainage ditch is filled with…

A:

Q: The illumination at a point is inversely proportional to the square of the distance of the point…

A: Let's denote the distance of point P from light source I as "x". According to the given information,…

Q: How many nanoseconds does it take light to travel 4.50 ftft in vacuum?

A: Given information Distance traveled by the light in vacuum d = 4.50 ft Let light takes time t to…

Q: The length of the base of the prism never changes because it has sheer cliffs on the ends. Give a…

A: Given information: The width of the base of the prism (w) = 1 km The length of the base of the prism…

Q: y 1 in. 3 in. 3 in.

A: Two Dimensional centroid problem. Divide the Figure/body into pieces that are known shapes (holes…

Q: With the sun directly​ overhead, an airplane takes off at a speed S of 235 mph at an angle θ of 17°…

A: Given  Speed of the airplane is v=235 mph Angle of the airplane with the horizontal is θ=17°   We…

Q: Slit separation, d (cm) Fringe separation, Ay, (cm) 0.025 Slits to screen distance, L= so %3D cm…

A:

Q: if the index of refraction of glass is 1.502, what is the speed of light in glass?

A: Given information: Here, nglass and nair the refractive index of the glass and air (standard value)…

Q: compute the index of refraction for the substance where lightpropagates with speed v=2.7 • 10^8 m/s.…

A: Refractive index is the ratio of the speed of light in vacuum to the speed of the light in that…

Q: Why were you not able to calculate ∠i ÷ ∠R or (sin ∠i ) ÷ (sin ∠R) for an angle of incidence of 0°?

A:

Q: •57 A point source of light is 80.0 cm below the surface of a body of water. Find the diameter of…

A:

Q: Write the answer down. Then, round off to the correct number of significant figures. # of SF Correct…

A: Disclaimer: “Since you have asked posted a question with multiple sub-parts, we will solve the first…

Q: mat maximum tension could this fiber support without breaking? press your answer with the…

A:

Q: A person is standing at the edge of the water and looking out at the ocean (see figure). The height…

A: a) Apply the Pythagoras theorem in the triangle to calculate the distance of the person's eyes from…

Q: Where is the 10^11 from in the b part of the problem? From the problem, it's 1.50 × 10^8. Thank…

A: Given value--- speed of light = 2.998 x 10^8 m/s. average distance from the Sun to Earth, 1.50 X…