Class 10 Exam > Class 10 Videos > Best Trick For Mirror's Formula || How to Solve Mirror Numericals || 10 CBSE NCERT Questions ||
Best Trick For Mirror's Formula || How to Solve Mirror Numericals || 10 CBSE NCERT Questions || Video Lecture - Class 10
FAQs on Best Trick For Mirror's Formula -- How to Solve Mirror Numericals -- 10 CBSE NCERT Questions -- Video Lecture - Class 10
| 1. What is the mirror's formula? |  |
Ans. The mirror's formula is a formula used to calculate the focal length (f), object distance (u), and image distance (v) of a mirror. It is given by 1/f = 1/v + 1/u, where f is the focal length, v is the image distance, and u is the object distance.
| 2. How can I solve mirror numericals using the mirror's formula? | |
Ans. To solve mirror numericals using the mirror's formula, you need to follow these steps:
1. Identify the given values: Determine the known values such as focal length, object distance, or image distance.
2. Substitute the values: Plug in the known values into the mirror's formula.
3. Solve for the unknown: Rearrange the formula to solve for the unknown variable. For example, if you need to find the focal length, rearrange the formula to get 1/f = 1/v + 1/u and solve for f.
4. Calculate the result: Once you have solved for the unknown variable, calculate the value using the given formula.
5. Verify the answer: Check if the calculated value is reasonable based on the given conditions and the properties of mirrors.
| 3. Can you provide 10 CBSE NCERT questions related to mirror numericals? | |
Ans. Here are 5 CBSE NCERT questions related to mirror numericals:
1. A concave mirror has a focal length of 10 cm. An object is placed 20 cm in front of the mirror. Calculate the image distance.
2. A convex mirror has a focal length of -15 cm. An object is placed 30 cm in front of the mirror. Calculate the image distance.
3. A concave mirror has an object distance of 25 cm and an image distance of 15 cm. Calculate the focal length of the mirror.
4. A convex mirror has an object distance of 40 cm and an image distance of 20 cm. Calculate the focal length of the mirror.
5. A concave mirror has a focal length of 20 cm. An object is placed 30 cm in front of the mirror. Calculate the image distance.
| 4. How can I determine the type of mirror based on the given numerical values? | |
Ans. To determine the type of mirror based on the given numerical values, you can use the following guidelines:
1. If the focal length (f) is positive, it indicates a concave mirror.
2. If the focal length (f) is negative, it indicates a convex mirror.
3. If the object distance (u) is positive and the image distance (v) is negative, it indicates a concave mirror.
4. If the object distance (u) is negative and the image distance (v) is positive, it indicates a convex mirror.
5. If both the object distance (u) and image distance (v) are positive or negative, further calculations are required to determine the type of mirror.
| 5. What are the properties of mirrors that need to be considered while solving numericals? | |
Ans. When solving mirror numericals, the following properties of mirrors need to be considered:
1. The focal length (f) determines the curvature of the mirror. A positive focal length indicates a concave mirror, while a negative focal length indicates a convex mirror.
2. The object distance (u) is the distance between the object and the mirror.
3. The image distance (v) is the distance between the image and the mirror.
4. The magnification (m) of the mirror determines the size of the image compared to the object. It can be calculated using the formula m = -v/u.
5. The sign conventions for distances and magnification should be followed, where positive values indicate real, upright images, and negative values indicate virtual, inverted images.
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Nov 14, 2024 Last updated |
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