On a hot summer night, the refractive index of air is smallest near the ground and increases with height from the ground. When a light beam is directed horizontally, the Huygens' principle leads us to conclude that as it travels, the light beam
On a hot summer night, the refractive index of air is smallest near the ground and increases with height from the ground. When a light beam is directed horizontally, the Huygens' principle leads us to conclude that as it travels, the light beam
- [JEE MAIN 2015]
- A
goes horizontally without any deflection
- B
bends downwards
- C
bends upwards
- D
becomes narrower
Similar Questions
You have learnt in the text how Huygens’ principle leads to the laws of reflection and refraction. Use the same principle to deduce directly that a point object placed in front of a plane mirror produces a virtual image whose distance from the mirror is equal to the object distance from the mirror.
You have learnt in the text how Huygens’ principle leads to the laws of reflection and refraction. Use the same principle to deduce directly that a point object placed in front of a plane mirror produces a virtual image whose distance from the mirror is equal to the object distance from the mirror.
What is the shape of the wavefront in each of the following cases:
$(a)$ Light diverging from a point source.
$(b)$ Light emerging out of a convex lens when a point source is placed at its focus.
$(c)$ The portion of the wavefront of light from a distant star intercepted by the Earth.
What is the shape of the wavefront in each of the following cases:
$(a)$ Light diverging from a point source.
$(b)$ Light emerging out of a convex lens when a point source is placed at its focus.
$(c)$ The portion of the wavefront of light from a distant star intercepted by the Earth.
Explain the reflection of a plane wave using Huygen's principle.
Explain the reflection of a plane wave using Huygen's principle.
Spherical wavefronts shown in figure, strike a plane mirror. Reflected wavefront will be as shown in
Spherical wavefronts shown in figure, strike a plane mirror. Reflected wavefront will be as shown in
By Huygen's wave theory of light, we cannot explain the phenomenon of
By Huygen's wave theory of light, we cannot explain the phenomenon of