Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case.(a) Polished wooden table (b) Chalk powder(c) Card board surface (d) Marble floor with water spread over it(e) Mirror (f) piece of Paper.
Fill in the blanks in the following :(a) A person 1 m in front of a plane mirror seems to be ___ m away from his image.(b) If you touch your _______ ear with right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with ________(c) The size of the pupil becomes _________ when you see in dim light.(d) Night birds have ________ cones than rods in their eyes.
Image formed by a plane mirror is :(a) virtual, behind the mirror and enlarged.(b) virtual, behind the mirror and of the same size as the object.(c) real at the surface of the mirror and enlarged.(d) real, behind the mirror and of the same size as the object.
Gurmit wanted to perform activity 16.8 using a laser torch. Her teacher advised her to not to do so. Can you explain the basis of the teacher's advise?
Two mirrors meet at right angles. A ray of light is incident on one at an angle of 30° as shown in figure. Draw the reflected ray from the second mirror.
Boojho stands at A just on the side of a plane mirror as shown in figure. Can he see himself in the mirror? Also can he see the image of objects situated at P, Q and R?
(a) Find out the position of the image of an object situated at A in the plane mirror figure.(b) Can Paheli at B see the image? (c) Can Boojho at C see this image? (d) When Paheli moves from B to C, where does the image of A move?
