2 (a) State the factors on which electrical resistance of a
conductor depends.
[2]
b) Why do we get the spectrum of colours when white
light passes through a glass prism?
[2]
(c) Explain the position and nature of image with the
help of ray diagram of the image formation when the
object is placed at t
mirror
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Answers
Explanation:
(a) Question of current and electricity chapter...
(b) Question of ray optics chapter....
(c) Question of ray optics chapter...
Answer:
a) The resistance of a conductor depends on the cross sectional area of the conductor, the length of the conductor, and its resistivity.
b) When white light enters the prism, each kind of light within white light (all the colors) are reflected at different angles because of the different wavelengths. This effectively separates all of the colors present in white light into different bands which we can see as the spectrum.
c)(i) When an object is placed between the pole and focus of a concave mirror, the image is formed behind the mirror, it is virtual, erect and larger than the object.
(ii) When the object is placed between center of curvature and principal focus of a concave mirror the image formed is beyond C and it is real, inverted and magnified.
b. For the first case it is used as shaving mirror.
For the second case it is are useful tools for determining the location of an image as produced by a concave mirror.
chapter name is light....
Explanation:
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