CBSE Class 7 Science Light: Shadows and Reflections (Class 7 NCERT New) Quiz 9

1. Which of the flowing is a transparent object?

A A) Cardboard B B)Tracing paper C C) Air D D) Clear glass

2. Light travels in a:

A A) Circular path B B) Rectilinear path C C) Rotational path D D) Triangular path

3. Which of the following is not a necessary condition for the formation of ashadow?

A A) An opaque object B B) A screen C C) A transparent object D D) A source of light

4. Images of actors on screen in cinema halls are;

A A) Virtual images B B) Real images C C) Imaginary images D D) All the above

5. We can see any object if:

A A) It is a luminous object. B B) It reflects the light falling on it. C C) It is placed in a dark room. D D) Both [a] and [b]

6. Opaque objects:

A A) Allow light to pass through them. B B) Allow light to pass through them partially. C C) Allow light not to pass through them. D D) Both [b] and [c]

7. A very narrow beam of light is called:

A A) Ray B B) Beam C C) Candela D D) All the above

8. Which of the following images are real?

A A) Image formed on the screen of cinema hall. B B) Image formed by a pinhole camera. C C) Image formed by a concave mirror when object is placed at infinity. D D) All the above

9. Narrow beam of light before reflection in known as:

A A) Reflected ray B B) Incident ray C C) Normal ray D D) Reflection

10. State the answer 1. This source of light is emitted even when the object is not hot2. This source of light is emitted the object gets heated

A Incandescent and Luminescent, respectively B Luminous andNon- luminous, respectively C Fire and Water, respectively D Luminescent and Incandescent, respectively 5 All of the above