An incident ray makes an angle of 75° with the surface of a plane mirror. What will be the angle of reflection?
A ray of light is incident normally (perpendicularly) on a plane mirror. Where will this ray of does light go after reflection from the mirror?
What is the angle of incidence of a ray of light if the reflected ray is at an angle of 90° to the incident ray?
Which type of reflection of light, regular reflection or diffuse reflection, leads to the formation of images?
If an object is placed at a distance of 7.5 cm from a plane mirror, how far would it be from its image?
Name the phenomenon responsible for the following effect:
When we sit in front of a plane mirror and write with our right hand, it appears in the mirror that we are writing with the left hand.
How are the two plane mirrors in a periscope arranged?
(a) With respect to one another?
(b) With respect to the sides of the tube?
What will be the number of images formed when an object is placed between two parallel does plane mirror facing each other?
Name an instrument or toy which works by producing multiple reflections from three plane mirrors to form beautiful patterns.
State whether the following statements are true or false:
(a) A moon is an illuminated object.
(b) Diffuse reflection means the failure of the laws of reflection of light.
(c) In a kaleidoscope, a pattern seen once can never be seen again.
Fill in the following blanks with suitable words:
(a) The angle of _______ equals the angle of reflection.
(b) A person 1 m in front of a plane mirror seems to be _______ m away from his image.
(c) If you touch your _______ ear with the right hand in front of a plane mirror, it will be seen in the mirror that your right ear is touched with _______
(d) The size of the pupil becomes _______ when you see in dim light.
(e) Night birds have _______ cones than rods in their eyes.
(f) The image of an object persists on the retina of an eye for about _______ second even after the object has disappeared.
(g) If the still pictures of a moving object are flashed on our eyes at a rate faster than _______ pictures per second, the eye perceives the object as moving.
(h) In a movie, the still pictures in the proper sequence are projected on the screen usually at the rate of _______ pictures per second.
Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room? Explain.
What makes things visible to us? Why cannot we see a book which is placed (a) behind a wooden screen, and (b) in a dark room?
Name the two types of reflection of light. Which type of reflection makes us see an object from all directions?
A wall reflects light and a mirror also reflects light. What difference is there in the way they reflect light?
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