JAMB - Physics (1998 - No. 28)
An object is placed in front of two plane mirrors inclined at an angle of 0o. If the total number of images formed is 7, Find the value of \(\theta\)
30o
45o
51o
90o
解释
Number of image = \(\frac{360}{\theta}\) -1
7 = \(\frac{360}{\theta}\) -1
thus,\(\theta\) = 45o
7 = \(\frac{360}{\theta}\) -1
thus,\(\theta\) = 45o