NIOS Class 10 Science and Technology Chapter 15: LIGHT ENERGY– Chapter-wise Important Questions and Answers

NIOS Class 10 Science and Technology Chapter 15: LIGHT ENERGY | MCQs, Short & Long Answer Questions | 15: LIGHT ENERGY

Chapter 15: LIGHT ENERGY

INTEXT QUESTIONS 15.1

1. In column A, some sources of light are given. In column B, you have to write whether these are lumineus or non-lumineus.

Source (A)	Nature of source (B)
1. Glowing bulb 2. Burning candle 3. Moon 4. Fire fly 5. Shining steel plate	1.  ……………………. 2.   …………………… 3.   …………………… 4.  ……………………. 5.  ……………………..

Answer:

Source (A)	Nature of source (B)
1. Glowing bulb 2. Burning candle 3. Moon 4. Fire fly 5. Shining steel plate	1. Luminous 2. Luminous 3. Non-Luminous 4. Luminous 5.  Non-Luminous

 

2. Write two differences between real and virtual image.

Answer: Two differences between Real Image and Virtual Image

Real Image	Virtual Image
A real image is formed when light rays actually meet at a point.	A virtual image is formed when light rays appear to meet at a point.
A real image can be obtained on a screen.	A virtual image cannot be obtained on a screen.

3. When you are standing infront of a plane mirror, a virtual and correct image of you is formed. If some one is taking a photograph of it using camera, what will be the nature of image on photograph?

Answer: The image formed on the camera film/sensor is a real image, because a camera lens always forms a real image on the film or sensor. The photograph will show the same laterally inverted image as seen in the plane mirror.

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