Advertisements
Advertisements
प्रश्न
The seven colours in the spectrum of sunlight in order, are represented as :
पर्याय
VIBGYOR
VIGYBOR
BIVGYOR
RYOBIVG
Advertisements
उत्तर
VIBGYOR
APPEARS IN
संबंधित प्रश्न
Make two diagrams to explain refraction and dispersion.
What are the seven colours seen in a rainbow?
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 an experiment to trace the path of a ray of light through a glass prism for different values of angle of incidence a student would find that the emergent ray:
(A) is parallel to the incident ray
(B) perpendicular to the incident ray
(C) is parallel to the refracted ray
(D) bends at an angle to the direction of incident ray
State two properties of ultra-violet radiations which differ from visible light.
Write the range of wavelength of the ultraviolet spectrum.
Rainbow is a beautiful natural phenomenon. It is the combined effect of a natural three processes together produced by light. Write it into the circle.
Assertion: We can see the rainbow in the sky when the rain starts falling after a spell of bright sunlight.
Reason: The rainbow is formed due to the dispersion of light.
State True or False:
"Wavelength of red light is close to 700 nm.”
Make a rainbow
Try to make your own rainbow. You can try this project in the morning or in the evening. Stand with your back towards the Sun. Take a hosepipe or a water pipe used in the garden. Make a fine spray in front of you. You can see different colours of rainbow in the spray.
