Advertisements
Advertisements
प्रश्न
Fill in the following blank with a suitable word:
When light is reflected, the angles of incidence and reflection are ............ .
Advertisements
उत्तर
When light is reflected, the angles of incidence and reflection are equal.
APPEARS IN
संबंधित प्रश्न
Where is the image when you look at something in a mirror?
What is lateral inversion? Explain by giving a suitable example.
Write all the capital letters of the alphabet which look the same in a plane mirror.
A ray of light goes from water into air. Will it bend towards the normal or away from the normal?
State two effects caused by the refraction of light.
What is meant by 'refraction of light'? Draw a labelled ray diagram to show the refraction of light.
Light travels more quickly through water than through glass.
Which is optically denser : water or glass?
With the help of a labelled diagram, explain why a tank full of water appears less deep than it actually is.
When a ray of light travelling in glass enters into water obliquely:
(a) it is refracted towards the normal
(b) it is not refracted at all
(c) it goes along the normal
(d) it is refracted away from the normal
A vertical ray of light strikes the horizontal surface of some water:
What is the angle of refraction?
A ray of light when passes from glass to air, bends towards the normal.
Water is optically .......... than air.
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 size of image of an object by a convex lens of focal length 20 cm is observed to be reduced to `1/3` rd of its size . Find the distance of the object from the optical centre of the lens .
Identify the wrong figure from the following.
Explain the working of a periscope.
The refractive index of four substances A, B, C, and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is maximum in
The angle of incidence for a ray of light having zero reflection angle is ______.
The bending of light as it passes from one medium to another is called ______.
A star appears twinkling into the sky because of the reflection of light by the atmosphere.
