1. What is the the use of filters in police photography?
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Q: 2) Find critical angle for a water – air boundary
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A: Answer: As per the given statement,
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- 4. The focal length of a simple lens depends on the color (wavelength ) of light passing through it. Why? Is it possible for a lens to have a positive focal length for some colors and negative for others? Explain.11. A ray of light travels through a lens, like shown. What happens to the light?A. It is absorbed.B. It is diffused.C. It is reflected.D. It is refracted.In optics, what is meant by an “interface?” a. optically connecting one computer to another b. using the image created by one lens as the object for another lens c. when the crest of one wave lines up with the trough of another wave d. none of the above
- 49.) A refracting telescope uses a. both mirrors and lenses to collect and focus light from distant objects. b. only mirrors to collect and focus light from distant objects c. only lenses to collect and focus light from distant objects.Physics: reflection and refraction 1.What is the law of reflection? Does it apply to rough surfaces as well as smooth? b.Distinguish between regular and irregular reflection. Give an example of each. c. Why is light refracted when it passes from one medium into another? d. Is an image formed by reflection real or virtual? Where is it located1. What is a normal line and why is it necessary in refraction?
- What is the minimum data set that can be interpreted to yield two depths for a 1-interface model?a. One shot into one end of a line of geophones.b. Two shots; one at each end of the line.c. One shot at each end of the line and one at it’s centre.d. As many shots as it takes to get a refraction arrival at every geophone from both directions.5. A lens of a certain 35-mm digital camera has a focal length of 55 mm. How close to the ccd should the lens be placed to form a sharp image of an object that is 5.0 m away? What is the magnification of the object on the camera's ccd? [Answer: di 5.6 × 10-² m; m = −0.011] -2 =Investigate different types of microscopes.Learn how image is formed in a compound microscope.
- 7. speed in vacuum. The speed of light inside some material is reduced by 25% from the What is the index of refraction of the material? a) n = = 3 b) n = 4 c) n = 34 d) Something else. (Please explain.)pility: Good to go The sun is 150,000,000 km from earth; its diameter is 1,400,000 km. For a science project on solar power, a student uses a 24-cm-diameter converging mirror with a focal length of 53 cm to focus sunlight onto an object. This casts an image of the sun on the object. For the most intense heat, the image of the sun should be in focus. a. Where should the object be placed? b. What is the diameter of the image? 2 c. The intensity of the incoming sunlight is 1050 W/m². What is the total power of the light captured by the mirror? d. What is the intensity of sunlight in the projected image? Assume that all of the light captured by the mirror is focused into the image. Focus 88 E 84°F ^This questions have of multiple true & false. Choose a CORRECT set of answer for each question.