On which theory nature of light depends upon:
Why light is said to have a dual nature?
Answer: It exhibits the properties of wave and particles.
When angle of incidence in denser medium is greater than critical angle, will total internal reflection take place or not?
Sun is a good example of
In vacuum, Light travels at a speed of
Choose wrong, size of image formed in a plane mirror
Answer: could be taller than the mirror
Normal, incident ray and reflective ray lie at a same point in
Answer: Reflection and refraction both
Ratio equal to constant (in refraction) is
Which object does not reflect more light?
Name a metal which is the best reflector of light?
An incident ray is:
Answer: The ray of light which falls on the mirror surface
Which statement is correct about the laws of reflection:
(i) The incident ray, normal ray and the reflected ray all lie in the same plane.
(ii) The angle of reflection is always equal to the angle of incidence.
(iii) The angle of incidence is equal to the angle formed by normal ray.
(iv) The angle of reflection is equal to 90o.
Answer: Both (i) and (ii)
When a parallel beam of incident light is reflected as a parallel beam in one direction, this reflection is known as:
Answer: Regular reflection
Total internal reflection occurs when
Answer: light passes from denser to less dense medium
If we observe a pebble in a pool, pebble would appear to be
Answer: nearer to the surface than it really is
An instrument which enables us to see things which are too small to be seen with naked eye is called
Lens in which light rays are brought to focal point is
Bend of light rays or image in denser medium is termed as
Angle between incident ray and normal ray is called angle of
Anything which gives out light rays is called :