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A ray of light is incident on a plane mirror at an angle of 30°. What is the angle of reflection?
Determine the angle of incidence of a ray of light, if the reflected ray is at an angle of 90° to the incident ray?
Mention how many reflected rays can be obtained for a given single incident ray falling on a plane mirror?
Mention the type of reflection of light takes place from
(a) a rough surface
(b) a smooth surface
Is the image of an object in plane mirror virtual or real?
Explain, why the virtual image cannot be taken on screen.
Is laws of reflections are valid for irregular reflection?
Soldiers use the periscope while sitting in a bunker. Why?
Determine the number of images formed when an object is placed between two parallel plane mirrors facing each other.
Draw a ray diagram of the formation of images when two mirrors as placed at an angle of 90° to each other.
Mention the name of a phenomenon which takes places when patterns are formed in a kaleidoscope.
Explain, what happens when a beam of sunlight is passed through a glass prism.
Mention type of lens is present in the human eye.
Name the point inside the human eye where the image is not visible.
Name the phenomenon which enables us to see movies in a cinema hall.
Explain what happens to the size of the pupil of our eye in bright.
Name the part of our eye that gives it as distinctive colour.
Name some auditory aids which are useful for visually changed persons.
Explain in brief about Braille with the help of some example.
Mention the name of the most popular resource for visually challenged persons which can make them read and write.
What happens to the size of the pupil of our eye in bright?
Which part of the eye gives it as distinctive colour?
State the information that you get about sunlight from the formation of a rainbow.
Name the part of the eye
(a) Which controls the amount of light entering the eye.
(b) Which converges light rays to form the image.
Name the cells on the retina of an eye
(a) Which are sensitive to bright light.
(b) Which are sensitive to dim light.
Name any four food items (including two fruits) which are rich in vitamin A.
What is the value of the speed of light?
If two plane mirrors make an angle of 60°, how many images will you find?
What controls the amount of light entering the eye?
What controls the size of the pupil?
Describe the functioning of the periscope. Also, tell that how many mirrors are there in a periscope.
Name any one defect of the eye. How is it corrected?
Briefly explain the term persistence of vision.
Explain lateral inversion with an example.
What do you mean by sources of light?
How does lateral inversion occur?
What are the functions of optic nerve and retina?
Draw a diagram of the human eye.
Briefly mention, which of the following will cause regular reflection of light and which diffuse reflection of light.
Polished wooden table
Marble floor with water spread over it.
Draw a labeled diagram showing how a plane mirror an image of a point placed in front of it.
State the characteristics of the image of the image formed in a plane mirror.
Explain the laws of reflection with the help of a diagram.