Advertisements
Advertisements
Question
Which property of light makes a pencil cast a shadow when it is held in front of a light source?
Advertisements
Solution
One property of light that makes a pencil cast a shadow when it is held in front of it is that light travels in a straight line.
APPEARS IN
RELATED QUESTIONS
Name the phenomenon responsible for the following effect:
When we sit in front of a plane mirror and write with our right hand, if appears in the mirror that we are writing with the left hand.
Which type of reflection of light leads to the formation of images?
A ray of light passes from air into a block of glass. Does it bend towards the normal or away from it?
In which material do you think light rays travel faster-glass or air?
Which phenomenon of light makes the water to appear shallower than it really is?
A vertical ray of light strikes the horizontal surface of some water:
What is the angle of incidence?
Image is formed by a mirror due to refraction of light.
When a ray of light travels from water to air, it bends ............. the normal.
Draw suitable diagrams to illustrate how a beam of light incident parallel to the principal axis is reflected by:
(a) a concave mirror, and (b) a convex mirror
We can see the sun even when it is little below the horizon because of ______.
Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 × 108 m s−1.
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 phenomenon of change in the direction of light when it passes from one transparent medium to another is called ___________.
The laws of reflection hold true for ______.
The incident rays and refracting rays are on opposite sides of the normal.
Observe the given figure and write appropriate phenomenon of light in the box.
What is refractive index?
A pencil when dipped in water in a glass tumbler appears to be bent at the interface of air and water. Will the pencil appear to be bent to the same extent, if instead of water we use liquids like, kerosene or turpentine. Support your answer with reason.
The bottom of swimming pool appears to be less deep than the actual one because of
