1. CONCISE Physics - Middle School - 7
1. Physical Quantities and Measurement
4. Light energy
7. Electricity and Magnetism
1. Objective Questions
2. Short/Long Answer Questions
Q1) What do you mean by the term reflection of light?
Q2) How is a plane mirror made?
Q3) Explain the following terms :
Incident ray, reflected ray, angle of incidence, angle of reflection, normal
Q4) Draw a diagram showing the reflection of a light ray from a plane mirror. Label on it the incident ray, the reflected ray, the normal, the angle of incidence i and the angle of reflection r.
Q5) State the two laws of reflection of light.
Q6) Describe an experiment to verify the laws of reflection of light and laws of reflection
Q7) A ray of light falls normally on a plane mirror. What is the angle of incidence?
Q8) Draw a diagram to show the reflection of a light ray incident normally on a plane mirror.
Q9) The diagram in fig. Shows an incident ray AO and the reflected ray OB from a plane mirror. The angle AOB is 30°. Draw normal on the plane mirror at the point O and find :
(i) the angle of incident
(ii) the angle of reflection
Q10) In the following diagrams, measure and write the angle of incidence and draw the reflected ray in each case.
Q11) The diagram in fig. Shows an incident ray AO and the normal ON on a plane mirror. Draw the reflected ray. State the law you use to draw the direction of the reflected ray.
Q12) The following diagram shows an incident ray AO and the normal ON on a plane mirror. Find the angle of incidence and angle of reflection.
Q13) State in words, how do you find the location of an image of an object formed by a plane mirror?
Q14) Draw a ray diagram showing the formation of a point object by a plane mirror.
Q15) The following diagram shows a point object O placed in front of a plane mirror. Take two rays from the point O and show how the image of O is formed and seen by the eye.
Q16) State four characteristics of the image formed by a plane mirror.
Q17) How is the position of image formed by a plane mirror related to the position of the object ?
Q18) You are standing at a distance 2 metre from a plane mirror.
(a) what is the distance of your image from the mirror?
(b) what is the distance between you and your image ?
Q19) What is meant by lateral inversion of an image mirror? Explain it with the help of a diagram.
Q20) Write down the letter C and I as seen in a plane mirror.
Q21) What is irregular reflection? Give an example.
Q22) How do we see objects around us ?
Q23) State two uses of a plane mirror?
Q24) Can light travel in vacuum?
Q25) State the speed of light in (a) air (b) glass.
Q26) State whether light slows down or speeds up in the following cases:
(a) light going from air to glass
(b) light going from glass to water
(c) light going from water to air
Q27) What are the primary colours ? name the three primary colours.
Q28) What are the secondary colours ? name the three secondary colours.
Q29) Fill in the blanks with the appropriate colors
(a) blue + ........... = cyan
(b) red +blue + ........... = white
(c) red + blue = ...........
(d) green + red = ...........
Q30) The leaves appear green when seen in white light. Give a reason.
Q31) A rose appears red in white light. How will it appear in (i) green light (ii) red light ? Give a reason for your answer for each.
Q32) Why does a piece of paper appear white in sunlight? How would you expect it to appear when viewed in red light?
Q33) A piece of paper appears black in sunlight. What will be its color when seen in red light ?
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CONCISE Physics - Middle School - 7
Physical Quantities and Measurement
Electricity and Magnetism
Short/Long Answer Questions
Race To Space
Terms & Policies