SECTION B 1. Define the principal focus of a concave mirror
b. Name a mirror that can give an erect and enlarged image of an object.
a. The radius of curvature of a spherical mirror is 20 cm. What is its focal length?
c. Why do we prefer a convex mirror as a rear-view mirror in vehicles?
2. A converging (concave) mirror has a focal length of 5.0 cm. A 1.0-cm tall candle is
placed at a distance of 2.5 cm in front of the mirror.
(a) By drawing a ray diagram, find the location of the image formed by the
converging mirror. State whether the image is real or virtual, upright or inverted,
(b) Using the mirror and magnification equations, verify your results from (a
and larger, smaller, or the same size as the object (candle).​

sleep paralysis is a parasomnia, events associated with sleep.

sleep paralysis happens when you are in the middle of waking up or falling asleep. it is the feeling of being conscious but unable to move. it definitely involves hallucinations.

i had a friend that had sleep paralysis and he told me a story one time where he was laying in bed and he couldn't move his body no matter how hard he tried and there was someone standing in the corner of his room coming towards him. he couldn't move and you can't "wake up" because you are already conscious. sometimes sleep paralysis can be triggered by frequent waking up during the night based off of multiple trips to the bathroom, or if you had ever been abused, sleep paralysis can start happening from things like that.

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation: