Critical angle of light passing from glass to water is minimum for
(a) red colour (b) green colour
(c) yellow colour (d) violet colour
1 Answers
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One die of red colour, one of white colour and one of blue colour are placed in a bag.
A die has six faces that are numbered from 1 to 6, with one number on each face. Let us denote the red, white, and blue dices as R, W,...
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Light enters from air into glass having refractive index 1.50. What is the speed of light in glass? The speed of light in vacuum is 3 x 108 ms-1.
Given,n=1.5 and the speed of light in vacuum, c = 3x 108 ms-1. We know that the refractive index is given by the expression n =c/v where c is the...
1 Answers 1 views
Three identical towels of red, blue and green colour are hanging on a clothes line in the sun. What would be the colour of shadows of these towels?
The colour of shadows of all three towels will be the same.
1 Answers 1 views
One die of red colour, one of white colour and one of blue colour are placed in a bag
A die has six faces that are numbered from 1 to 6, with one number on each face. Let us denote the red, white, and blue dices as R, W,...
1 Answers 1 views
Assertion : Critical angle is minimum for violet colour.
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
1 Answers 1 views
The refractive index of a glass is 1.520 for red light and 1.525 for blue light
(a) For a thin prism, D = (μ – 1) A Since λb < λr ⇒ μr < μb ⇒ D1 < D2
1 Answers 1 views
In a box there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?
(e) If the drawn ball is neither red nor green, then it must be blue, which can be picked in 7C1 = 7 ways. One ball can be picked from...
1 Answers 4 views
Total internal reflection can take place when light travels from: (a) diamond to glass (b) water to glass
(a) Total internal reflection is an optical phenomenon that happens when a ray of light strikes a medium boundary at an angle larger than a particular critical angle with respect...
1 Answers 1 views
There are some balls of red, green and yellow colour lying on a table. There are as many red balls as there are yellow balls.
(b) According to question R = y and y = 2G ∴ R = 2G Hence, the number of red balls is double the number of green balls.
1 Answers 1 views
In a certain code, 256 means red colour chalk, 589 means green colour flower,
(B) In the first and second statements, the common digit is 5 and the common word is colour. So, 5 means colour. In the first and third statements, the common code...
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