The refractive power P = 1/f
here f is the focal length which measured in meters
so the unit of refractive power is 1/meter = m^-1
Answer : m^(-1)
If the refractive power of this lens was DECREASED, would the
focal length for the lens increase or decrease? Explain your
answer.
2. If the refractive power of this lens was DECREASED, would the focal length for the lens increase or decrease? Explain your answer. (2 pts) Question 1 4 pts Answer BOTH parts of this question 1. If light passing through a convex lens reaches its focal point 12.5 cm from the lens, what is the refractive power of...
if the power in the primary circuit of 4:1 transformer is 12 watts, what will be the power in the secondary of this transformer? a. 3 watts b. 4 watts c. 12 watts d. 48 watts
The units of power, Watts, are same as A. Joules/second B. Joules.meters C. Joules.seconds D. Joules/meter
Do 120 Joules of work in 2 minute, and your power output is a. 120 Watts. b. 2 Watts. c. 240 Watts. d. 1 Watt.
Question 1 The power radiated by a lossless antenna is 10 watts. The directional characteristics of the antenna are represented by the radiation intensity of U = 2cos3θ watts/unit solid angle. Find the (a) Maximum power density at a distance of 1000 m (assume far-field distance) (b) Maximum directivity (c) Maximum gain Question 2 In target-search ground-mapping radars it is desirable to have echo power received from a target, of constant cross section, to be independent ofits range. For one such application, the desirable radiation intensity...
sustainable energy
Problem 2: If a PV array has a maximum power output of 10 watts under irradiance level of 600 W/m2 a. What must the irradiance be to achieve a power output of 17 watts? b. Would you expect the open circuit voltage to increase or decrease? c. Would you expect the short circuit current to increase or decrease?
Problem 2: If a PV array has a maximum power output of 10 watts under irradiance level of 600 W/m2...
If 1-6A and R-1.5 ohms determine the power (in Watts) absorbed by R. Use 2 decimal places. (Unit not required) 2 A 3 0
A nearsighted person has a far point located 0.8 m from their eyes. The refractive power of the corrective lenses is approximately: -0.8 D -1.25 D 0.8 D 1.25 D
A farsighted person has a near point located 0.80 m from their eyes. The refractive power of the corrective lenses is approximately: -2.75 D 2.75 D 0.36 D -0.36 D
NEED HELP ON #2 A nearsighted pharmacy student has eyes who have a relaxed refractive power of 49 diopters and her retina is 2.3 cm from her lens. 1). If she is nearsighted, what is her far point? If she is far-sighted, what is her near-point? .1804 m 2) Let's say she wants to be able to focus clearly on objects that are from 150 m to 6.5 cm away. What is the power of the corrective lens she should...