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Consider the following statements. i) For a perfect reflection, the angle of incidence will be equal to the angle of reflection. ii) The critical angle is the angle of incidence in the denser medium for which the angle of refraction in the rarer medium is 90°. Which of the above statements are true?
An incident ray strikes a plane mirror at an angle of incidence of 50°. What is the decrease in the angle of reflection, if the incident ray moves to angle of incidence of 30°?  
Which one of the following statements is/are incorrect regarding waves? (A) wave height is not indicator of wave energy (B) wave height is controlled by wind strength (C) the distance of open water a wave travels over affects the wave height (D) the depth of the sea is important factors affecting wave height Choose the most appropriate answer from the options given below:
The angle of incidence of a wave of a wave with angle of transmission 45 degree and the refractive indices of the two media given by 2 and 1.3 is
Angle ‘A’ of a cyclic quadrilateral ABCD is 53° less then angle B. Angle B is twice of angle C and angle C is 40° more than angle D. What would be the measure of angle A?
The minimum deviation is observed with a prism having the angle of prism A, the angle of deviation δ, the angle of incidence i and angle of emergence e. We then have generally
Many wave properties are dependent upon other wave properties. Yet, one wave property is independent of all other wave properties. Which one of the following properties of a wave is independent of all the others?
In the given question, a part of the sentence is printed in bold. Below the sentence, three alternatives to the bold part are given which may help improve the sentence. Choose the option that reflects the correct use of the phrase in the context of the sentence. In case the given sentence is correct, your answer is (E) i.e. No correction required. They hurried up the booths back and waited for the malformed youth to disperse. i. to the booths back ii. for towards the booths back iii. for the booths backing
Distance at which a sky wave is received back on earth ________ with an angle of incidence.
The refractive index of a parallel glass slab is 1.57. A light, from medium Y, is incident on the glass slab. If the angle of incidence is 37°, then the angle of emergence, when the light emerges back to medium Y, is ____