A lightbulb is 3.5 m from a wall. Part A What is the focal length of a lens that will form an image on the wall that is twice the size of the lightbulb? Express your answer to two significant figures and include the appropriate units. ► View Available Hint(s) f= Submit Part B HA Value Units ? What is the position (measured from the bulb) of the lens. Express your answer to two significant figures and include the appropriate units.

Help with problem B

An eye is corrected by a – 4.5-D lens, 1.8 cm from the eye. Is this eye near - or farsighted? farsighted nearsighted Submit Previous Answers v Correct Part B What is this eye's far point without glasses? Express your answer using three significant figures. AE ? FP = cm from eye

Part A A 1.2-cm-tall object is 78 cm in front of a diverging lens that has a -39 cm focal length. Calculate the image position. Express your answer to two significant figures and include the appropriate units. HÀ ? s' = Value Units Submit Request Answer Part B Calculate the image height. Express your answer to two significant figures and include the appropriate units. HA ? h' = Value Units Submit Request Answer

Part A A converging lens with a focal length of 60 cm and a diverging lens with a focal length of -50 cm are 290 cm apart. A 3.5-cm-tall object is 80 cm in front of the converging lens. Calculate the image position relative to the diverging lens. Express your answer to two significant figures and include the appropriate units. Enter a positive value if the image is on the other side from the lens and a negative value if the image is on the same side. HẢ ? s'2 Value Units %D Submit Request Answer Part B Calculate the image height. Express your answer to two significant figures and include the appropriate units. HA h' = Value Units %3D Submit Request Answer

The observer in figure is positioned so that the far edge of the bottom of the empty glass (not to scale) is just visible. When the glass is filled to the top with water, the center of the bottom of the glass is just visible to the observer. Find the height, H, of the glass, given that its width is W=4.8cm. Express your answer using two significant figures.

Part A A sharp image is located 391 mm behind a 263-mm-focal-length converging lens. Find the object distance. Follow the sign conventions. Express your answer to three significant figures and include the appropriate units. HA do = Value Units Submit Request Answer Provide Feedback Next>

Use ray diagrams and the mirror equation to locate the position, orientation, and type of image of an object placed in front of a concave mirror of focal length 20 cm. Part C The object distance is 40 Cm; find the distance from the image to the mirror (positive for real image and negative for virtual image). Express your answer with the appropriate units. CH μA s' = Submit Part D Value m = cm Previous Answers Request Answer * Incorrect; Try Again; 26 attempts remaining ? The object distance is 40 Cm; find the magnification (positive for upright image and negative for inverted image). [ ΠΙΑΣΦ ?

Part A A reflecting telescope (Figure 1) has a radius of curvature of 3.00 m for its objective mirror and a radius of curvature of -1.50 m for its secondary mirror. rea If the distance between the two mirrors is 0.92 m, how far in front of the secondary mirror should you place the electronic sensor to record the image of a star? ent Sharing ettings Express your answer to two significant figures and Include the approprlate units. e Tools HA ? d; = Value Units %3D Figure 1 of 1 Submit Request Answer < Return to Assignment Provide Feedback Secondary mirror Sensor

Figure 0 1 of 1 Part A The mirror in the figure (Figure 1)deflects a horizontal laser beam by angle 0. What is the angle if 0 = 64°. Express your answer to two significant figures and include the appropriate units. Submit μÅ Value Provide Feedback Request Answer Units ? Next