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Consider the following statements: A ray parallel to the principal axis incident on a concave mirror after reflection passes through the focus. A ray passing through the center of curvature of a concave mirror after reflection is reflected back along the same path. A ray passing through the center of curvature of a concave mirror after reflection passes through the focus. Which of the following statement is INCORRECT?
Statement I: Due to diffused or irregular reflection of light, a closed room gets light even if no direct sunlight falls inside the room. Statement II: Irregular reflection, where the reflected rays are not parallel, does not follow the laws of reflection.
Statement I Due to diffused or irregular reflection of light, a closed room gets light even if no direct sunlight falls inside the room.
Statement II Irregular reflection, where the reflected rays are not parallel, does not follow the laws of reflection.
Below are given four statements followed by four conclusions. You have to take the given statements to be true even if they appear to be at variance with commonly known facts, and then decide which of conclusions logically follows from the given statements. For each question, mark out an appropriate answer choice that you think is correct. Statements: Some kind are intelligent. Some cruel are kind. All cruel are people. No people is an animal. Conclusions: I. No cruel is an animal. II. Some kind are not an animal. III. Some kind are not intelligent. IV. All animals are intelligent.
The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options. P: We can be kind to human beings who need our help. Q: Kindness is a quality that human beings show in various ways. R: We can also be kind to other life forms like dogs, cats and other pets and domesticated animals, and to wildlife like birds and animals. S: We can be kind to our family members, relatives, friends and neighbours.
The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the mostlogical order of sentences from among the options. P: We can be kind to human beings who need our help.
Q: Kindness is a quality that human beings show in various ways.
R: We can also be kind to other life forms like dogs, cats and other pets and domesticated animals, and to wildlife like birds and animals.
S: We can be kind to our family members, relatives, friends and neighbours.
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?
The beautiful rainbow seen in the sky in rainy season is the result of which of the following natural phenomenon ? (a) Refraction (b) Dispersion (c) Internal Reflection (d) External Reflection  
Optical fibre is based on which of the following principles? a. Principle of reflection of light b. Principle of refraction of light c. Principle of total internal reflection d. Principle of dispersion of light
Consider the following statements   1. The repeated reflection that results in this persistence of sound is called reverberation. 2. The repeated reflection that results in this persistence of sound is called echo. Which of the statement is   CORRECT  ?