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Syllabus
Q.9.a. A point source S, convex lens L and plane mirror M are placed in front of each other, such that rays of light from S return to it after reflection from M.
(a) What is the distance OS called?
(b) To which point will the rays return if M is moved towards the lens L to be in contact with it.
(a) new distance between the object and its image
(b) distance between the two positions of the image
times the size of object. Find (a) the focal length of mirror (b) position of image.
1 where is the image of insect formed?
2 what is the distance between insect andits image?
3 state any two characteristics of image formed in a plane mirror?
Q.2. Copy the figure and show the image formation with the help of rays.
Plz ans fast
Q2. An object placed in front of a plane mirror is slowly moved towards the mirror at a rate of 1.5 cm s–1. At what rate the object is approaching its image formed in the mirror ?
A car is situated 30 m from a convex mirror of focal lenght 3.0 m. Find the position, nature and magnification of the image formed. What is the use of such a mirror?
An object of length 4 cm is placed in front of a concave mirror at distance 30 cm. The focal length of mirror is 15 cm. (a) Where will the image form? (b) What will be the length of image?
-Repeating the question:-
Q. "'If you want to see enlarged image of your face,which type of mirror will you use? Where will you place your face? '''
("DON'T SEND THE SIMILAR QUERIES.")
11. A concave mirror forms a virtual image of size twice that of the object placed at a distance 5 cm from it. Find :
(a) the focal length of the mirror
(b) position of image.
Ans. (a) 10 cm, (b) 10 cm behind the mirror
Q. What is Newton's colour disc ? What does the Newton's colour disc experiment establish about the nature of white light ?
-Repeating the question:-?
Q.(c) Copy the figure. By taking two rays from point A, show the formation of image. State four characteristics of image.
Answer to my question..........
Why the ray passing from the centre of curvature retraces it's path????
##Dont cheat from the internet##
Pls give me answer fast as I am having my exam.........
Q. Name the radiations which occur, beyond the visible red band of electromagnetic spectrum.
State one use of above radiation.
State one way of detecting above radiation.
(b) Give one use each of the electromagnetic radiations given below:
(i) Microwaves (ii) Ultraviolet radiations
(iii) Infrared radiation.