Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
State the characteristics of the image formed by a plane mirror.
A light ray is incident normally on a plane mirror. (a) What is its angle of incidence?
Figure shows an incident ray AO and the normal ON on a plane mirror. The angle which the incident ray AO makes with mirror is 30°. (a) Find the angle of incidence. (b) Draw the reflected ray and then find the angle between the incident and reflected rays.
In the figure is shown a concave mirror. A is a point on the principal axis. If an object O is kept at A, image is formed on A itself. Copy the diagram. Draw the image in the diagram. Is the image real or virtual?
Measure the distance PA and write it in the diagram. What is the distance PA called?
Mark a point B on the principal axis, at which, if a point source of light is kept, the rays travel parallel to principal axis after reflection from M. What is point B called?
Identify the following kind of beam of light.
The word PLATE written on a paper is held in front of a plane mirror. Write down the letters as seen in the following case.
The paper is held perpendicular to the mirror.
State whether true or false. If false, correct the statement.
The reason for brilliance of diamonds is total internal reflection of light.
Higher Order Thinking Skills.
When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?
A burning candle in water
Take a shoe box, open on one side. Place a small lighted candle in it. Place a clear glass sheet (roughly 25 cm × 25 cm) in front of this candle figure. Try to locate the image of the candle behind the glass sheet. Place a glass of water at its position. Ask your friends to look at the image of the candle through the sheet of glass. Ensure that candle is not visible to your friends. Your friends will be surprised to see the candle burning in water. Try to explain the reason.
