Advertisements
Advertisements
प्रश्न
The optical density of turpentine is higher than that of water while its mass density is lower. Figure shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in figure, the path shown is correct?
विकल्प
1
2
3
4
उत्तर
2
Explanation:
Here, light ray goes from (optically) rarer medium air to optically denser medium turpentine, then it bends towards the normal, i.e., θ1 > θ2 whereas when it goes from optically denser medium turpentine to rarer medium water, then it bends away the normal.
APPEARS IN
संबंधित प्रश्न
A tank is filled with water to a height of 12.5 cm. The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9.4 cm. What is the refractive index of water? If water is replaced by a liquid of refractive index 1.63 up to the same height, by what distance would the microscope have to be moved to focus on the needle again?
A diver under water, looks obliquely at a fisherman standing on the bank of a lake. Would the fisherman look taller or shorter to the diver than what he actually is?
A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. The image will form at
Consider the situation in figure. The bottom of the pot is a reflecting plane mirror, S is a small fish and T is a human eye. Refractive index of water is μ. (a) At what distance(s) from itself will the fish see the image(s) of the eye? (b) At what distance(s) from itself will the eye see the image(s) of the fish.
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.
What is critical angle and total internal reflection?
Obtain the equation for radius of illumination (or) Snell’s window.
A light travels through water in the beaker. The height of water column is 'h'. Refractive index of water is 'μw'. If c is velocity of light in air, the time taken by light to travel through water will ______.
The critical angle is maximum when light travels from ______.
`(a^mu"w"=4/3,a^mug=3/2)`
If `"^imu_j` represents refractive index, when a light ray goes from medium i to medium j, then the product `"^2mu_1 xx ^3mu_2 xx ^4mu_3` is equal to ______.
