Physics: lenses/light multiple choice. Which one of the following choices correc
ID: 1427390 • Letter: P
Question
Physics: lenses/light multiple choice.
Which one of the following choices correctly describes how a camera is able to produce well-focused images of objects that are at different distances from the camera?
a)The lens-sensor distance is adjusted so that it equals the image distance for the object to be photographed.
b)The amount of light entering the camera is adjusted until the image on the sensor appears to be focused.
c) The focal length of the lens is adjusted so that the image on the sensor is focused.
A grating consists of a large number of parallel, narrow, evenly-spaced slits. Consider two gratings, identical except that one has more slits than the other, illuminated with light from identical monochromatic sources. Which one of the following statements correctly describes the result of increasing the number of slits?
a) Increasing the number of slits causes the maxima to become narrower and brighter.
b) Increasing the number of slits causes the maxima to become closer together.
c) Increasing the number of slits causes the maxima to become further apart.
Explanation / Answer
a)The lens-sensor distance is adjusted so that it equals the image distance for the object to be photographed.
c) The focal length of the lens is adjusted so that the image on the sensor is focused. Because our ultimate aim is to recieve as much clear image as we can get on our sensor.
Both the above statements are delivering the same meaning.
PART 2
a) Increasing the number of slits causes the maxima to become narrower and brighter.
distance between the maxima won't change.