Can you please help me with these? You must write an explanation as to why the a
ID: 1534907 • Letter: C
Question
Can you please help me with these?
You must write an explanation as to why the answer that is the best answer, and the answer that is NOT the best answer
Q1: An object is placed in front of concave spherical mirror as shown below the tree rays 1, 2, and 3, leave the top of the object and, after reflection, converge at a point on the top of the image. Ray 1 is parallel to the principal axis, ray 2 passes through F, and ray 3 passes through C. Which ray will exit the mirror parallel to the axis?
The best answer: 2 only An explanation:
Not the best answer: 1 only An explanation:
Q2: EXERCISES A tube open at both ends has a fundamental frequency of 554 Hz. The speed of sound in air is 343 m/s. What is the length of a tube that is open at one end and closed at the other end would have the same fundamental frequency?(show all your work)
Q3: EXERCISES A 3.00 cm tall object is 44.0 cm in front of convex mirror of focal length -30.0 cm. Locate and describe the image?(show all your work)
F 2 CExplanation / Answer
Q.1 Only 2 will emerge parallel to axis after reflection as any ray passing through focus becomes parallel after reflection.
Q. 2 speed = frequency/ wavelength
wavelength = 4 L
343= 554/ 4L
L = 40.379 cm apprx ( lengthof tube)
Q. 3 1/f = 1/v + 1/u
1/ ( - 30 ) = 1/v + 1/ 44
1/v = -1/ 44 - 1/30
1/v = - ( 30 + 44)/ ( 30 x 44)
v ( image distance) = -17.837 cm apprx
m = v/u = - (- 17.837/ 44) =0.405
size of image = 0.405 ( 3) = 1.216
image is virtual, erect and diminished