Advertisements
Advertisements
प्रश्न
Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the Figure Which of the following could be inside the box?
पर्याय
A rectangular glass slab
A convex lens
A concave lens
A prism
Advertisements
उत्तर
A rectangular glass slab
Explanation -
In the given situation, the incident ray and the emergent ray are parallel to each other. It is possible only in the case of rectangular glass slab.
APPEARS IN
संबंधित प्रश्न
Wirte down the letter C and I as seen in a plane mirror.
Draw a figure showing the following.
- Incident Ray
- Normal
- Angle of incidence
- Angle of reflection
- Point of incidence
- Reflected ray
Describe the principle of simple periscope through an outline ray diagram. Give one of its uses.
Why do automobile drivers prefer convex mirror as a rear vew mirror? Illustrate your answer.
Copy the figure and complete it, by drawing two rays to show the formation of the image of the object AB. State the size, position and nature of image formed.
Identify the following kind of beam of light.
The angle between an incident ray and the mirror is 350.
(i) What is the angle of incidence?
(ii) What is the angle of reflection?
(iii) What is the total angle turned by the ray of light?
(iv) What is the angle between the incident and the reflected rays?
By geometrical construction, find the position of the image in the following figure.
An object is placed in front of a convex mirror of focal length 25 cm. By scale, a drawing shows the formation of image and states the nature of image.
Given that v = 10 cm.
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?
Materials which reflect the light well are called ______.
Play with a mirror
Write your name with a sketch pen on a thin sheet of paper, polythene or glass. Read your name on the sheet while standing in front of a plane mirror. Now look at your image in the mirror.
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.
