Advertisements
Advertisements
प्रश्न
What is a rainbow?
उत्तर १
A rainbow is a curving optical phenomenon of seven colours caused by the refraction, reflection, and dispersion of sunlight in water droplets.
उत्तर २
The rainbow is seen as a large area in the sky with many colors.
APPEARS IN
संबंधित प्रश्न
As light rays pass from air into a glass prism, are they refracted towards or away from the normal?
What happens when a ray of ordinary light is passed through a triangular glass prism?
Which of the following colour of white light has the least wavelength?
(a) red
(b) orange
(c) violet
(d) blue
Define the term dispersion of light.
In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray
(a) is parallel to the incident ray.
(b) is along the same direction of incident ray.
(c) gets deviated and bends towards the thinner part of the prism.
(d) gets deviated and bends towards the thicker part (base) of the prism.
In which of the following four diagrams is the correct path of a ray of light passing through a glass prism shown ?
Answer the following question:
Differentiate between a glass slab and a glass prism. What happens when a narrow beam of
(i) a monochromatic light, and
(ii) white light passes through
(a) glass slab and
(b) glass prism?
What is the cause of the dispersion of white light through a glass prism? Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in an inverted position with respect to each other and a narrow beam of white light is allowed to fall obliquely on one of the faces of the prisms.
Observe the given figure and write appropriate phenomenon of light in the box.
The angle of deviation through a prism is minimum when
- Incident rays and emergent rays are symmetric to the prism.
- The refracted ray inside the prism becomes parallel to its base.
- The angle of incidence is equal to that of the angle of emergence.
- When the angle of emergence has doubled the angle of incidence.
Choose the correct answer from the options given below:
