Light Science - Light

A student studies that a plane mirror results in a laterally inverted image after reflecting. Which of these represents the image likely to be formed by a plane mirror?

In the figure of the human eye, the cornea is represented by the letter

Part of the eye which controls the entering of light is called

___________ is the transparent part of the outermost layer of eye.

The incident ray, the normal ray and the reflected ray, all lie in the_____________ plane.

In a movie, the still pictures in proper sequence are projected on the screen usually at the rate of __________ pictures per second.

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.

Eyes of the nocturnal birds have large cornea and a large pupil. How does this structure help them?

Explain what happens to light when it gets dispersed? Also, give an example.

Draw figure showing the position of the plane mirror. Also, label the angle of incidence and angle of reflection on it.

Figure shows the word REST written in two ways in front of a mirror. Show how the word would appear in the mirror? 

Sunlight is a mixture of eight different colours.

Periscope works on the multiple reflection by plane mirror.

The law of reflection is not valid for rough surfaces.

Visually challenged people can read and write with hearing aid.

Sunlight, called white light consists of seven colours.

How is the phenomenon of reflection used in making a kaleidoscope. What are the applications of a kaleidoscope?

Sunita is a science student. She performs an activity to obtain multiple images of an object by two plane mirrors. She starts placing these mirrors at different-different angles. She was surprised to see the number of images started increasing as she decreases the angle between two plane mirrors.
(i) Draw a ray diagram for the formation of images when two plane mirrors are parallel to each other. 
(ii) Name two devices which is based on the multiple reflection between two plane mirrors.
(ii) How do we determine the number of images formed by two plane mirrors at a certain angle?
(iii) How do we determine the number of images formed by two plane mirrors at a certain angle?

Draw a labelled diagram showing how a plane mirror forms an image of a point placed in front of it.

Explain the laws of reflection with the help of diagram.

Write down the names of parts of the eye in the blank spaces shown in figure.

Name the part of the eye which gives colour to the eyes.

Boojho while waving his hand very fast in front of his eyes, observes that his fingers appear blurred. What could be the reason for it?

The angle between incident ray and reflected ray is 60°. What is the value of angle of incidence?

How many times a ray of light is reflected by two plane mirrors placed parallel and facing each other?

What kind of lens is thicker at the centre?