Advertisements
Advertisements
प्रश्न
Stars twinkle due to ______.
पर्याय
reflection
total internal reflection
refraction
polarisation
उत्तर
Stars twinkle due to refraction.
APPEARS IN
संबंधित प्रश्न
A point ‘O’ marked on the surface of a glass sphere of diameter 20 cm is viewed through glass from the position directly opposite to the point O. If the refractive index of the glass is 1.5, find the position of the image formed. Also, draw the ray diagram for the formation of the image.
Answer the following question.
Define absolute refractive index and relative refractive index. Explain in brief with an illustration for each.
Why do stars twinkle?
What is mirage?
What is Snell’s window?
Derive the equation for acceptance angle and numerical aperture, of optical fiber.
When a ray of light is incident normally on one refracting surface of an equilateral prism of refractive index 1.5, the emerging ray ______.
`[sin^-1(1/1.5)=41.8^circ]`
When a ray of light is refracted from one medium to another, then the wavelength changes from 6000Å to 4000Å. The critical angle for the interface will be ______.
There are certain material developed in laboratories which have a negative refractive index (Figure). A ray incident from air (medium 1) into such a medium (medium 2) shall follow a path given by.
A convex lens made of material of refractive index 1.5 and having a focal length of 10 cm is immersed in a liquid of refractive index 3.0. The lens will behave as ______.
