Advertisements
Advertisements
Question
Select the correct alternative.
The luminous body is
Options
a lighted bulb
earth
noon
table
Advertisements
Solution
a lighted bulb
APPEARS IN
RELATED QUESTIONS
Can light travel in vacuum?
Fill in the blank.
A medium which allows light to pass through it easily is called the ...................
Is the moon a luminous object?
Answer the following.
What is meant by luminous intensity? What is one lumen?
Match the following.
| Group A | Group B |
| (a) Mirror | (1) Non-luminous |
| (b) Firefly | (2) Inverted image |
| (c) Pinhole camera | (3) Reflection |
| (d) Moon | (4) Luminous |
Choose the translucent substance from the following
Match the following.
| 1. | Ratio of height of image to height of object. | Concave mirror |
| 2. | Used in hairpin bends in mountains. | Total internal reflection |
| 3. | Coin inside water appearing slightly raised. | Magnification |
| 4. | Mirage | Convex mirror |
| 5. | Used as Dentist’s mirror. | Refraction |
Why are traffic signals red in colour?
Boojho and Paheli were given one mirror each by their teacher. Boojho found his image to be erect and of the same size whereas Paheli found her image erect and smaller in size. This means that the mirrors of Boojho and Paheli are, respectively
A student observes a tree given in the following figure through a pin hole camera. Which of the diagrams given in the following figure (a) to (d), depicts the image seen by her correctly?
