All in the blanks.
1
mirror and
lens always from a virtual image
image is formed upright as compared to the object
3
are used in spectacles by people suffering from eye defects
4. Splitting of white light is called
5 To obtain an image on screen we would require a
lens
Give reasons for the following.
lons burn a piece of paper using sunlight.
Answers
Answer: 1 Convex mirrors always produce upright, virtual images. ... At such an object location, the image would be virtual, upright, and magnified. In F, the object is located between the center of curvature and the focal point of a concave mirror; the image would be real, inverted, and magnified.
2 Myopia or short-sightedness can be corrected by wearing spectacles containing a concave lens. This is because when a concave lens of suitable power is used for the myopic eye then the concave lens first diverges the parallel rays of light coming from a distant object.
4 dispersion
5 real mirror or convex lens
Convex lenses concentrates the light energy to one spot on the paper so that the heat energy accumulates on that one small spot of paper. As the heat increases, combustion will occur when the spot becomes too hot and the paper will burn.
Explanation: