Advertisements
Advertisements
प्रश्न
As light rays pass from air into a glass prism, are they refracted towards or away from the normal?
Advertisements
उत्तर
As light rays pass from the air into a glass prism, they are refracted towards the normal because glass is denser than air.
APPEARS IN
संबंधित प्रश्न
In the following ray diagram the correctly marked angle are:
(a) ∠i and ∠e
(b) ∠A and ∠D
(c) ∠i, ∠e and ∠D
(d) ∠r, ∠A and ∠D
Name the process which is involved in the formation of a rainbow.
Which of the following coloured light has the least speed in glass prism?
(a) violet
(b) yellow
(c) red
(d) green
The diagram below shows the path taken by a narrow beam of yellow monochromatic light passing through an equiangular glass prism. If the yellow light is replaced by a narrow beam of white light incident at the same angle, draw another diagram to show the passage of white light through the prism and label it to show the effect of prism on the white light.
What conclusion do you draw about the nature of white light in part (b)?
The frequency range of visible light is from 3.75 × 1014 Hz to 7.5 × 1014 Hz. Calculate its wavelength range. Take speed of light = 3 × 108 m/s.
In which of the following four diagrams is the correct path of a ray of light passing through a glass prism shown ?
A wave has wavelength 50Å of State its one use.
Differentiate between a glass slab and a 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.
Write the range of wavelength of the visible spectrum.
Write the range of wavelength of the infrared spectrum.
What is dispersion? Explain in detail.
Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?
The splitting of white light into its component colours is called ____________.
What is Newton’s disc?
During dispersion of white light by prism placed in air, for a particular value of angle of prism,
A ray of light is incident at 45° on an equilateral prism in the diagram below.
- Name the phenomenon exhibited by the ray of light when it enters and emerges out of the prism.
- State the cause of the above phenomenon mentioned by you.
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.
