Advertisements
Advertisements
प्रश्न
The angle of reflection is equal to the angle of incidence:
(a) always
(b) sometimes
(c) under special conditions
(d) never
Advertisements
उत्तर
(a) Always, in accordance with the first law of reflection, which states that the angle of reflection is equal to the angle of incidence.
APPEARS IN
संबंधित प्रश्न
Which property of light makes a pencil cast a shadow when it is held in front of a light source?
Where is the image when you look at something in a mirror?
What type of reflection of light takes place from a cinema screen?
A boy with a mouth 5 cm wide stands 2 m away from a plane mirror. Where is his image and how wide is the image of his mouth?
State the uses of plane mirrors.
A man stands 10 m in front of a large plane mirror. How far must the walk before he is 5 m away from his image?
How does the light have to enter the glass:
to produce a large amount of bending?
The speed of light is more in glass than in water.
Light travels at a lower speed in water than in air.
The diagram (figure) given below shows two parallel rays 1 and 2 incident on (a) a concave mirror, (b) a convex mirror. Draw the reflected rays and mark the focus by the symbol F.
A ray of light A incident from air suffers partial reflection and refraction at the boundary of water.
- Complete the diagram showing (i) the reflected ray B and (ii) the refracted ray C.
- How are the angles of incidence i and refraction r related?
List four characteristics of the image formed by a concave lens of focal length 20 cm when the object is placed at a distance of 40 cm from its optical centre.
The incident rays and refracting rays are on opposite sides of the normal.
The refractive index of a transparent medium is always greater than ______.
The angle of incidence for a ray of light having zero reflection angle is ______.
In the above diagram light is travelling through different media. It is noted by a scientist that ∠1= ∠3 = ∠4 but ∠2 < ∠1. Which of the following statement would be correct?
The bending of light as it passes from one medium to another is called ______.
Mirage is an example of refraction and the total internal reflection of light.
