(a) Kerosene
(b) Water
(c) Mustard oil
(d) Glycerine
1 Answers
Talk Doctor Online in Bissoy App
A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?
The light ray bends towards the normal. When a ray of light travels from an optically rarer medium to an optically denser medium, it gets bent towards the normal. Since...
1 Answers 1 views
A metal sphere of volume V has a terminal velocity 2m/s in glycerine. The terminal velocity of sphere of volume 8V in glycerine will be-:
This formula leads me to v=k.r^2=k.V/r which gives me v=k.V and it give me v=16m/s which is wrong, the answer is 8m/s ?
1 Answers 1 views
What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?
As per the laws of reflection The angle of incidence ∠i = angle of reflection ∠r Here as given ∠i + ∠r = 90° ∴ ∠i + ∠i = 90 ° or ∠i =...
1 Answers 1 views
A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why
Light ray travelling in air and entering obliquely into water is bent towards the normal; because the speed of the ray decreases in water.
1 Answers 2 views
You are given kerosene, turpentine oil and water. In which of these does the light ray travel fastest? Given refractive index of kerosene = 1.44
Speed of light in a medium is inversely proportional to refractive index of the medium, i.e, v∝1/n. As refractive index of water is minimum, so light travels fastest in water.
1 Answers 1 views
Why does a ray of light bend when it travels from one medium into another?
When a ray of light travels from one medium to another, its speed changes and this change in speed of light causes the bending of light (refraction of light).
1 Answers 1 views
List all items known to you that float on water. Check and see if they will float on an oil or kerosene.
Wooden block, Paper, Balloon, Hair, plastic bottle, wooden logs, Boat etc. will float on water. A few of these like hair, balloon can float on kerosene or oil. Generally, substances...
1 Answers 1 views
You are provided with the following materials— turmeric, honey, mustard oil, water, glucose, rice flour,
Soluble (i) honey in water (ii) glucose in water (iii) groundnut oil in mustard oil Insoluble (i) turmeric in water (ii) rice flour in water (iii) mustard oil in water
1 Answers 1 views
You have neem oil in a beaker. In order to study saponification reaction, which of the following chemical substances would you add to this oil ?
(b) 20% NaOH
1 Answers 2 views
A light ray is incident at an angle of 45° with the normal to a √2 cm thick plate (μ= 2.0).
How can we do this question by shift formula?
1 Answers 1 views