Reflection and Refraction Pen Paper Test 2 Class – X
This test consists of 6 questions and each question carries 5 marks.
Total number of the test is 30 marks and time of the test is 1 hour 20 minutes.
Student should write answers of the questions in a separate paper. Take the image of the answers and convert it in a PDF file to upload.
For this purpose, the time is given 15 minutes. Therefore, the total time duration of the test is 1 hour 35 minutes.
You have to complete all the process within the required time. If the time is over then you can’t upload the file and result page comes automatically.
You can download the derived answer sheet of the test from the link given.
Your evaluated answer sheet will be send to the registered email.
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Question 1 of 6
1. Question
5 point(s)Category: Reflection and Refraction P.P.T. Class – X1. When a concave mirror is placed facing the sun, the sun’s rays converge to a point 10 cm from the mirror. Now, if you place a 2 cm long candles flame 20 cm away on the principal axis of the mirror, where would you place a screen to obtain the image of the candle? What would be the size of the image? Draw a ray diagram to justify your answer. A cube of edge 6 cm is placed over a printed page. At what distance from the top surface of cube will the letters appear when seen from above? Refractive index of glass is 1.5. (3+2)
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Question 2 of 6
2. Question
5 point(s)Category: Reflection and Refraction P.P.T. Class – X2. A 2 cm high object is placed at a distance of 32 cm from a concave mirror. The image is real, inverted and 3 cm in size. Find the focal length of the mirror and the position where the image is formed? A student has to perform an experiment on tracing the path of a ray of light passing through a rectangular glass slab for three different angles of incidence. Two of his friends suggest the following options to him: (A) Draw the incident rays corresponding to
, 
and 
as angles of incidence and fix the two pins on the incident ray just 2 cm apart. (B) Draw the incident rays corresponding to 
, 
and 
as the angles of incidence and fix two pins on the incident rays nearly 8 cm apart. Which is the better option he should follow? Give reason in support of your answer. 3+2-
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Question 3 of 6
3. Question
5 point(s)Category: Reflection and Refraction P.P.T. Class – X3. An object of height 1.2 m is placed before a concave mirror of focal length 20 cm so that a real image is formed at a distance of 60cm from it. Find the position of an object. What will be the height of the image formed? How much time will light take to pass through the glass slab of thickness 2 m. The absolute refractive index of glass is 1.5. (2+3)
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Question 4 of 6
4. Question
5 point(s)Category: Reflection and Refraction P.P.T. Class – X4. If the image formed by a spherical mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it? Draw a labelled ray diagram to support your answer. Explain the formation of mirage with proper diagram. (2+3)
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Question 5 of 6
5. Question
5 point(s)Category: Reflection and Refraction P.P.T. Class – X5. Why a ray of light passing through the centre of curvature of a concave mirror gets reflected along the same path? Explain. What is the nature of the image formed by a concave mirror if the magnification produced by the mirror is +3? A ray of light is incident on a plane of a glass slab from air at an angle
and due to refraction, the ray is defeated through an angle 
. Calculate the refractive index of the glass slab. (2+3)-
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Question 6 of 6
6. Question
5 point(s)Category: Reflection and Refraction P.P.T. Class – X6. Why the sun is visible to an observer after the actual sunset? Explain the term ‘absolute refractive index of a medium’ and write an expression to relate it with the speed of light in vacuum. Explain the sparkling effect of diamond. (2+1+2
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