The earth takes 24 h to rotate once about its axis. How much time does the sun take to shift by 1° when viewed from the earth?

1. 3 minutes

2. 2 minutes

3. 1 minutes

4. 4 minutes

Subtopic:  Refraction at Curved Surface |
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Light from a point source in the air falls on a convex spherical glass surface (n = 1.5 and radius of curvature = 20 cm) of a glass medium which extends till infinity on other side . The distance of the light source from the glass surface is 100 cm. At what position the image is formed?

1. at a distance of 200 cm from the glass surface, in the direction of incident light.

2. at a distance of 100 cm from the glass surface, in the direction of incident light.

3. at a distance of 200 cm from the glass surface, in the opposite direction of incident light.

4. at a distance of 100 cm from the glass surface, in the opposite direction of incident light.

Subtopic:  Refraction at Curved Surface |
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A magician during a show makes a glass lens with = 1.47 disappear in a trough of liquid. What is the refractive index of the liquid? 
1. 1.47
2. 1.33
3. 0.66
4. 1.5

Subtopic:  Refraction at Curved Surface |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
Please attempt this question first.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology